FY2014 Annual Report
Theory of Quantum Matter Unit
Associate Professor Nic Shannon
Abstract
The major event of FY2014, so far as the TQM Unit was concerned, was the "OIST International Workshop on Novel Quantum Materials and Phases" (NQMP 2014), held in OIST from 14th17th May 2014. At the time, this was the largest workshop organised by OIST, with almost 100 participants, bringing together some of the leading figures from the fields of physical chemistry, experimental physics and theoretical physics. The workshop, while logistically challenging, was a great success, with participants praising the strong support they received from members of the OIST Workshop Division, the interdisciplinary mix of the program, and the friendly and stimulating atmosphere of the OIST campus.
A new arrival in the TQM Unit was Dr Yutaka Akagai, a recent Ph.D graduate from the University of Tokyo, who brought with him an interest in the interplay between itinerent electrons and frustrated magnetism. Owen Benton who joined the TQM Unit as a special student in FY2012, also successfully defended his PhD, at the University of Bristol, and assumed a postdoc postion within the group. The new members who joined the TQM Unit in 2013 contributed some interesting new research topics, such as the study of membranes, described below. And the unit continued to work on problems of longstanding interest such as spin ice and quantum spinnematics. Scientific highlights included the experiments confirming the predictions by unit members of the existence of a magnetic supersolid in AgNiO2, and a breakthrough in understanding the multiferroic properties of spin ice, with further progress made in understanding quantum spin nematics and quantum spinliquid phases.
Members of the TQM Unit were also active in presenting their findings to the scientific community, giving a total of 39 presentations at international conferences and research institutions, including 19 invited talks. These presentations took place at 14 International workshops and conferences, including the March Meeting of the American Physical Society, both the Spring and Autumn Meetings of the Japanese Physical Society, the conference "Highly Frustrated Magnetism 2014" and the 13th Bilateral GermanJapanese symposium “Interplay of Spin and Orbital Degrees of Freedom in Strongly Correlated Electron Systems”.
The TQM Unit also brought a large number of visitors to OIST in FY 2013, hosting a Research Intern, Ms. Kimberly Remund (EPFL), and 15 visiting researchers, including Prof. Ian Affleck of the University of British Columbia, and Prof. Nigel Hussey, director of the Nijmegen High Field Magnet Laboratory. Between them, these visitors gave 11 research seminars, on topics ranging from topological order to the chemistry of new magnetic materials.
1. Staff
 Prof. Nic Shannon, Associate Professor
 Dr. Ludovic Jaubert, Group Leader
 Dr. Yutaka Akagi, Postdoctoral Scholar
 Dr. John Owen Benton, Postdoctoral Scholar
 Dr. Karim Essafi, Postdoctoral Scholar
 Dr. Mathieu Taillefumier, Postdoctoral Scholar
 Dr. Hiroaki Ueda, Postdoctoral Scholar
 Mr. Rico Pohle, PhD Student
 Mr. Han Yan, PhD Student (Supervised by Prof. Hirotaka Sugawara)
 Ms. Kimberly Remund, Research Intern (March 2015 )
 Ms. Shiho Saito, Research Administrator
2. Collaborations
 Theme: Quantum Spin Nematics Under High Field
 Researchers:
 Prof. Keisuke Totsuka, YITP, Kyoto University
 Dr. Hiroaki Ueda, OIST
 Researchers:
 Theme: Topological Defects on Spin Nematics
 Researchers:
 Dr. Yutaka Akagi, OIST
 Prof. Nic Shannon, OIST
 Dr. Hiroaki Ueda, OIST
 Researchers:
 Theme: Optics of Graphene from Dot to Sheet
 Researchers:
 Prof. Keshav Dani, OIST
 Dr. Eleftheria Kavousanaki, OIST
 Mr. Rico Pohle, OIST
 Prof. Nic Shannon, OIST
 Researchers:
 Theme: Curie law crossover in frustrated magnets
 Researchers:
 Dr. Ludovic Jaubert, OIST
 Mr. Rico Pohle, OIST
 Researchers:
 Theme: Multiphase competition in pyrochlores
 Researchers:
 Dr. Owen Benton, OIST
 Prof. Michel Gingras, University of Waterloo / Perimeter Institute / Canadian Institute for Advanced Research, Canada
 Dr. Ludovic Jaubert, OIST
 Prof. Jaan Oitmaa, University of New South Wales, Australia
 Dr. Jeff Rau, University of Waterloo, Canada
 Prof. Nic Shannon, OIST
 Prof. Rajiv Singh, University of California, Davis, USA
 Researchers:
 Theme: Spin liquids in kagome systems
 Researchers:
 Dr. Owen Benton, OIST
 Dr. Karim Essafi, OIST
 Dr. Ludovic Jaubert, OIST
 Researchers:
 Theme: Multiferroicity in spinice materials
 Researchers:
 Dr. Ludovic Jaubert, OIST
 Prof. Roderich Moessner, MPIPkS, Germany
 Researchers:
 Theme: Anomalous dynamics and equilibrium properties of magnetic monopoles with shortrange interactions
 Researchers:
 Dr. Claudio Castelnovo, University of Cambridge, UK
 Dr. Ludovic Jaubert, OIST
 Prof. Roderich Moessner, MPIPkS, Germany
 Dr. Masafumi Udagawa, University of Tokyo
 Researchers:
 Theme: Spin dynamics in anisotropic systems
 Researchers:
 Dr. Owen Benton, OIST
 Dr. Ludovic Jaubert, OIST
 Prof. Nic Shannon, OIST
 Dr. Mathieu Taillefumier, OIST
 Researchers:
 Theme: Dynamics in kagome antiferromagnets
 Researchers:
 Prof. Benjamin Canals, CNRS, France
 Prof. Roderich Moessner, MPIPKS, Germany
 Dr. Julien Robert, CNRS, France
 Dr. Mathieu Taillefumier, OIST
 Researchers:
 Theme: Quantum water ice
 Researchers:
 Dr. Owen Benton, OIST
 Prof. Nic Shannon, OIST
 Dr. Olga Sikora, National Taiwan University
 Researchers:
 Theme: Classical spin liquids on the pyrochlore lattice
 Researchers:
 Dr. Owen Benton, OIST
 Dr. Ludovic Jaubert, OIST
 Prof. Nic Shannon, OIST
 Mr. Han Yan, OIST
 Researchers:
 Theme: Spontaneous formation of kagome network and Dirac halfsemimetal on a triangular lattice
 Researchers:
 Dr. Yutaka Akagi, OIST
 Prof. Yukitoshi Motome, University of Tokyo
 Researchers:
 Theme: Reconstruction of Chiral Edge States in a Magnetic Chern Insulator
 Researchers:
 Dr. Yutaka Akagi, OIST
 Prof. Yukitoshi Motome, University of Tokyo
 Mr. Ryo Ozawa, University of Tokyo
 Dr. Masafumi Udagawa, University of Tokyo
 Researchers:
 Theme: Magnon Hall Effect due to Spin Scalar Chiral Ordering in a Kondo Lattice System
 Researchers:
 Dr. Yutaka Akagi, OIST
 Prof. Yukitoshi Motome, University of Tokyo
 Dr. Masafumi Udagawa, University of Tokyo
 Researchers:
 Theme: Phase transitions in polymerized membranes
 Researchers:
 Dr. Karim Essafi, OIST
 Dr. JeanPhilippe Kownacki, University of Cergy, France
 Prof. Dominique Mouhanna, University Pierre and Marie Curie, Paris, France
 Researchers:
3. Activities and Findings
3.1 Spin excitations in frustrated magnets
The spin excitations of conventional magnets are well understood, and can be linked to the symmetries broken by magnetic order. Much less is known about the excitations of those highlyfrustrated magnets which do not show any conventional form of order. Evaluating the spin dynamics of these systems is very challenging, but one approach with great promise is the numerical integration of the semiclassical equations of motion for individual spins. Dr Mathieu Taillefumier, of the TQM Unit, has developed a powerful moleculardynamics code which accomplishes just this, and gives new insight into the dynamics of frustrated magnets.
In collaboration with scientists from the Laboratoire Leon Brillouin, France, Cornell University, USA, the Max Planck Institute for the Physics of Complex Systems in Germany, and the Institute Neel, France, Dr Taillefumier has applied this method to one of the most important models in frustrated magnetism, the Heisenberg antiferromagnet on a Kagome lattice [Figure 1]. Now, in collaboration with Dr Ludovic Jaubert, Dr Owen Benton and Prof. Nic Shannon of the TQM Unit, Dr Taillefumier is now developing his code further, for application to the spin dynamics of systems with anisotropic exchange. It is hoped that this approach will yield new insight into the magnetic excitations of the widelydiscussed "quantum spin ice" pyrochlores
Figure 1: Spin excitations in the octopolar phase of a Kagome antiferromagnet. The dynamical structure factor at fixed energy was calculated from numerical simulations of the semiclassical spin dynamics. Anisotropy in the dispersion is a precursor of the ordered state found at very low temperatures.
These results were published as M. Taillefumier et al., Phys. Rev. B. 90, 064419 (2014).
3.2 Quantum Spin Nematics
Quantum spin nematics are magnetic analogues of the liquidcrystal phases which are so ubiquitous in modern technology. For a long time, these states were regarded as a theoretical curiosity, but members of the TQM Unit have been central in showing that spinnematic phases can occur in realistic models of magnetic materials, and the search is now on for evidence that the spinnematics also occur in experiment.
One of the most promising places to look for a quantum spin nematic is in frustrated ferromagnetic materials built of stacked, squarelattice layers, in applied magnetic field. Building on earlier results for an isolated square lattice plane [N. Shannon et al., Phys. Rev Lett. 96, 027213 (2006)], Dr Hiroaki Ueda of the TQM Unit has made quantitative analysis of the different ordered phases occuring in such a materials in high magnetic field, as function of the interactions between spins. He finds a large range of parameters for which spinnematic order dominates. These results will be very useful to experimental groups searching for spinnematic states in experiment.
Figure 1: Phase diagram for a layered frustrated ferromagnet in applied magnetic field, as a function of exchange interactions within, and between, stacked squarelattice planes. A spinnematic phase is found approaching saturation for a wide range of parameters.
These results were published in the Letter H. T. Ueda, J. Phys. Soc. Jpn. 84, 023601 (2015).
While there is now good theoretical reason to believe in quantum spinnematic order, identifying spinnematics in experiment remains a significant challenge, not least because spin nematic phases are "invisible" to many of the most popular probes of magnetism. To address this issue, Dr Andrew Smerald, formerly of the TQM Unit and now working at EPFL, Switzerland, collaborated with Dr Ueda and Prof. Shannon to explore how such a spinnematic state would reveal itself in experiment. By combining a fieldtheoretical approach, developed by Dr Smerald, with a microscopic, latticebased approach, developed by Dr Ueda, it proved possible to make quantitative predictions for the inelastic neutron scattering from a quantum spinnematic in applied magnetic field. The spinnematic order reveals itself in a ghostly, linearlydispersing Goldstone mode, as shown in Fig. 2. An animation of the evolution the prediction for inelastic neutron scattering as a function of magnetic field can be found here.
Figure 2: [Left panel]. Illustration of a bondcentered spinnematic state in applied magnetic field, of the type proposed in N. Shannon et al., Phys. Rev Lett. 96, 027213 (2006). [Right panel]. Prediction for inelastic neutron scattering from such a fieldinduced spinnematic state, for parameters relevant to BaCdVO(PO4)2. The linearlydispersing signal at low energies is signature of spinnematic order.
These results were published as A. Smerald, H.T. Ueda and N. Shannon, Phys. Rev. B 91, 174402 (2015), and were singled out for inclusion in Physical Review's Kaleidascope.
3.3 Spin Ice
Ferromagnetism is what allows a magnet to stick onto the fridge, and is heavily used in the industry, from electric motors to computer harddisks. Ferroelectricity is its electric counterpart, discovered in the 1920's; first believed to be rather exotic, it is now a useful property for capacitors and sensor applications. In multiferroics, both ferromagnetism and ferroelectricity can coexist. The search for hightemperature multiferroics has drawn substantial efforts in the XXI century for its technological potential, such as the development of dissipationless electronics. Frustration has become a key ingredient in multiferroics because it provides mechanisms for strong magnetoelectric coupling. It also opens a window on the fundamental lowtemperature properties of matter where weak perturbations can play an important role. This holds especially true for the collective behavior of spin liquids  these exotic phases of matter which counterintuitively refuse to order  observed in a wide range of compounds from rareearth and copper oxides to organic Mott insulators or iridates.
Working together with Prof. Moessner from the Max Planck Institute in Dresden, Germany, Dr. Ludovic Jaubert of the TQM Unit investigated the multiple facets of such magnetoelectric coupling in spinice materials, famous for supporting the emergence of quasiparticles analogue to magnetic monopoles. Their key finding was the discovery of a bilayered crystal of these monopoles induced by magnetoelectric coupling, whose stability, remarkably, is strengthened by an external [110] magnetic field. Their theory accounts for the ordering process of the quantum spin ice candidate Tb2Ti2O7 in a large field, for reasonably small electric energy scales.
Figure 3. Magnetoelectric coupling in spin ice opens a window for the existence of a bilayered crystal of magnetic monopoles (green), in competition with antiferromagnetic order (red) and a Coulomb spin liquid (yellow).
These results were published as L.D.C. Jaubert and R. Moessner, Phys. Rev. B 91, 214422 (2015). This paper was chosen as an Editor's suggestion, and featured in the news story "Magnetic Monpoles : Crystal Clear" later quoted in ScienceDaily and Nanowerk.
In February 2015, an earlier work of Dr. Jaubert on this proplem, carried out in collaboration with Prof. Holdsworth of the Ecole Normale Superieure de Lyon, France [L.D.C. Jaubert and P .C. W. Holdsworth, Nature Phys. 5, 258261 (2009)] was singled out as one of the 12 featured papers for the first 10 years of Nature Physics.
3.4 Frustrated Magnets in Applied Magnetic Field
The theory of frustrated magnets in applied magnetic field has had a long and fruitful history, yielding many interesting predictions for new quantum phases. In recent years, advances in experimental technique, coupled with a steady stream of new materials, has made it possible to test many of these predictions for the first time.
In an earlier work, L. Seabra and N. Shannon, Phys. Rev. Lett. 104, 237205 (2010), members of the TQM Unit predicted the existence of a magnetic supersolid, a phase of matter which simultaneously exhibits properties usually associated with solids and liquids, in the frustrated magnet AgNiO2, in applied magnetic field. Now in collaboration with scientists from the Universities of Oxford and Bristol (UK), High Field Magnet Laboratory (Netherlands), Laboratoire National des Champs Magnétiques Intenses (France) and the MaxPlanckInstitut fur Festkorperforschung (Germany), they have revisited this problem, with the benefit of stateoftheart measurements of the magnetisation and conductivity of AgNiO2 in applied magnetic field. These measurements, which were carried out on a crystal no bigger than a grain of sand, represent and experimental tourdeforce. Good evidence is found for the supersolid phase proposed by Seabra and Shannon.
Figure 4: Comparison of the magnetic phase diagram of AgNiO2 measured in experiment with that obtained in the Monte Carlo simulations. At low temperatures, the collinear antiferromagmetic phase gives way to a magnetic supersolid in applied magnetic field.
These results were published the Rapid Communication A. I. Coldea et al., Phys. Rev. B 90, 020401(R), (2014).
3.5 Statistical mechanics of membranes
The physics of twodimensional surfaces have regained considerable interest over the last decade following the discovery of the first genuinely twodimensional system namely Graphene. It has been shown that the flat phase of polymerized membranes correctly describes the mechanical properties of graphene. More generally and beyond graphene, polymerized membranes possess another phase in which the membrane is crumpled. The transition between the flat and crumpled phases can be either first order or continuous. This has been studied by Dr Karim Essafi, of the TQM Unit, using a nonperturbative renormalization group technique.
In collaboration with scientists from the University Pierre and Marie Curie (UPMC) and the University of Cergy (UCergy), France, Dr Karim Essafi has applied this method to study the transition between the flat and crumpled phases and found that this transition is of firstorder in agreement with the most recent Monte Carlo simulations [Figure 5]. In collaboration with Prof. Dominique Mouhanna (UPMC) and Dr JeanPhilippe Kownacki (UCergy), Dr Karim Essafi is now investigating the behaviour of polymerized membranes with quenched disorder.
Figure 5: For a general membrane of dimension D embedded in a space of dimension d, with the physically interesting case corresponding to D=2 and D=3, one can compute the line separating a firstorder transition (below the line) from a continuous transition (above the line). The three curves in blue, red and green corresponds to three different orders of expansion, respectively 4th, 6th and 8th. One see that physical membranes are below the curve which means a firstorder transition between the crumpled and the flat phases.
These results were published as K. Essafi et al. Phys. Rev. E 89, 042101 (2014).
3.6 Itinerant electrons and frustrated magnetism
In a long history of study on localized spin systems, a lot of exotic magnetic phases such as spin liquid state have been found and wellestablished concept as our basic thoughts. On the other hand, much less is known about an effect of the presence of itinerant electrons on such a frustrated magnet. In this challenging research area, Dr Yutaka Akagi, of the TQM Unit, has first found a stable nontrivial noncoplanar magnetic order associated with topological Hall effect in the world [J. Phys. Soc. Jpn. 79, 083711 (2010).]. In collaboration with scientists from the University of Tokyo in Japan, Dr Akagi has further investigated spincharge coupled systems on the most fundamental geometrical frustrated lattice, triangular lattice.
Dr Akagi found a ‘kagome network’ phase in the large Hund’s coupling region at a special filling, 5/8 filling in the presence of the antiferromagnetic superexchange interaction [Figure 6]. This nontrivial ferrimagnetic order consists of upspin sites forming a kagome lattice in the triangular lattice and downspins at the remaining sites. In the kagome network phase, the electronic structure shows a Dirac node with linear dispersion and the Fermi level locates right at the Dirac node. The Dirac electrons are fully spinpolarized due to the large Hund’s coupling.
Figure 6: (Left) Kagome network phase on a triangular lattice and (Right) its band structure. The blue (white) hexagon in the inset of right panel indicates the folded (original) Brillouin zone. The band dispersions are plotted along the symmetric line in the folded Brillouin zone. The dashed line indicates the Fermi level located just at the Dirac node at the K” point.
These results were published as Yutaka Akagi, and Yukitoshi Motome, Phys. Rev. B 91, 155132 (2015), with related work published in Ryo Ozawa, Masafumi Udagawa, Yutaka Akagi, and Yukitoshi Motome, J. Phys. Soc. Jpn. 83, 073706 (2014).; J. Phys.: Conf. Ser. 592, 012130 (2015).
4. Publications
4.1 Journals

Ueda, H. T. "Magnetic Phase Diagram Slightly below the Saturation Field in the Stacked J1–J2 Model in the Square Lattice with the JC Interlayer Coupling". Journal of the Physical Society of Japan. 84, 023601, DOI: 10.7566/JPSJ.84.023601 (2015)

Ozawa, R., Udagawa, M., Akagi, Y., and Motome, Y. "Surface and interface effects on a magnetic Chern insulator". Journal of Physics: Conferebce Series. 592 012130 (2015)

Taillefumier, M., Robert, J., Henley, C. L., Moessner, R. and Canals, B. "Semiclassical spin dynamics of the antiferromagnetic Heisenberg model on the kagome lattice". Physical. Review. B 90, 064419, DOI:10.1103/PhysRevB.90.064419 (2014)

Coldea, A. I., Seabra, L., McCollam, A , Carrington, A., Malone, L., Bangura, A. F., Vignolles, D., Van Rhee, P. G., McDonald, R. D., Sörgel, T , Jansen, M., Shannon, N. and Coldea, R. "Cascade of fieldinduced magnetic transitions in a frustrated antiferromagnetic metal". Physical Review B 90, 020401(R), DOI: 10.1103/PhysRevB.90.020401 (2014)

Ozawa, R., Udagawa, M., Akagi, Y., and Motome, Y."Reconstruction of Chiral Edge States in a Magnetic Chern Insulator” Journal of the physical society of Japan 83, 073706, DOI: 10.7566/JPSJ.83.073706 (2014)

Essafi, K., Kownacki, J.P and Mouhanna, D. "FirstOrder Phase Transitions in Polymerized Membranes". Physical Review E 89, 042101, DOI: 10.1103/PhysRevE.89.042101 (2014)
4.2 Books and other onetime publications
Nothing to report
4.3 Oral and Poster Presentations
Oral Presentations:
 Taillefumier M., Robert J, Henley C. H, Moessner R. and Canals B. “Semiclassical spin dynamics of the antiferromagnetic Heisenberg model on the kagome lattice”. in “Dynamics of Strongly Correlated Systems” workshop, ISSP, University of Tokyo (Mar 2015)
 Shannon N. “Quantum Spin Ice”,Texas A & M University, USA (Mar 2015)
 Pohle, R., Kavousanaki, E., Dani, K and Shannon, N. “Optics of Graphene from Dot to Sheet” in JPS Spring Meeting 2015, Waseda University, Japan (Mar 2015)
 Ueda, H. T and Shannon, N. “Spin nematic phase near saturation field on the stacked J1J2 chain on Kagome lattice”. in JPS Spring Meeting 2015, Waseda University, Japan (Mar 2015)
 Akagi, Y., Ueda, H. T. and Shannon, N. “Topological defects in quantum spinnematics” in JPS Spring meeting 2015, Waseda University, Japan (Mar 2015)
 Benton, J. O., Jaubert, L. D.C., Rau, J., Oitmaa, J., Singh, R., Shannon, N. and Gingras, M. “What is going on in Yb2Ti2O7?” in APS march meeting 2015, San Antonio, USA (Mar 2015)
 Shannon N. “Quantum Spin Ice”, Los Alamos National Laboratory, Texas, USA (Mar 2015)
 Shannon N. “Quantum Spin Ice”, Rice University, Houston, USA (Mar 2015)
 Akagi, Y., Ueda, H. T. and Shannon, N.”Topological defects in quantum spinnematics” in APS March Meeting 2015, San Antonio, USA (Mar 2015)
 Shannon N. “Quantum Spin Ice”, ISSP, University of Tokyo (Jan 2015)
 Benton, J. O., Jaubert, L.D.C., Yan, H. and Shannon, N. ”Spin ice and beyond: towards a general theory of magnetism on the pyrochlore lattice”, University of Bristol, UK (Dec 2014)
 Jaubert, L. D.C. “Magnetoelectric effect in spin ice” in Novel Quantum States 2014, YITP, Kyoto University (Sep 2014).
 Ueda, H.T. “Spin nematic phase in the satckedsquarelattice model under high field” in JPS Autumn Meeting 2014, Chubu University (Sep 2014)
 Taillefumier, M., Robert, J., Henley, C. L., Moessner, R. and Canals, B. “Semiclassical spin dynamics of the antiferromagnetic Heisenberg model on the kagome lattice” in “Quantum Spin Dynamics: From Exotic Excitations to Novel Transport and NonEquilibrium Phenomena” Workshop, MPIPKS, Dresden, Germany (Sep 2014)
 Shannon N, Benton J O, McClarty P, Sikora O, Fulde P, Moessner R, Penc K and Pollmann F. “Quantum Spin Ice” in Workshop on Frontiers in Condensed Matter Physics, KIAS, Seoul, South Korea (Dec 2014)
 Smerald, A and Shannon, N. “Waves in the unseen: theory of spin excitations in a quantum spinnematic”, MPIPKS, Dresden, Germany (Sep 2014)
 Shannon N, Benton J. O., Sikora Olga, McClarty P, Pollmann F, Moessner R, Fulde P and Penc K. “Quantum Spin Ice” in International Workshop on Novel Directions in Frustrated and Critical Magnetism, Nordita, Stockholm, Sweden (July 2014)
 Benton J O. “Beyond Spin Ice: towards a general theory of magnetism on the pyrochlore lattice” University of Warwick, UK (July 2014)

Shannon N., Benton J. O., Sikora O, McClarty P, Pollmann F, Moessner R, Fulde P and Penc K. “Quantum Spin Ice” in 13th Bilateral GermanJapanese Symposium, Schloss Ringberg of Max Plank Gesellschaft, Germany (July 2014)
 Essafi K..”Nonperturbative Renormalization Group Approach to Polymerized Phantom Membranes”. Queen Mary University of London, UK (July 2014)
 Jaubert, L. D.C. “Recipe for spin liquid in pyrochlores”. in Novel Directions in Frustrated and Critical Magnetism, Nordita, Stockholm, Sweden (July 2014)
 Jaubert, L. D.C. “Breaking spin ice symmetry” in Highly Frustrated Magnetism Conference, University of Cambridge, UK
 Shannon, Nic. “A new classical spin liquid on the pyrochlore lattice” in Modern Trends in Quantum Magnetism Conference, Aspen Center for Physics, Aspen, CO, USA (May 2014)
 Jaubert, L. D.C. “ Spin liquids and exotic phases in rare earth pyrochlore oxides” in OIST International Workshop on Novel Quantum Materials and Phases, OIST Japan (May 2014)
 Jaubert, L. D.C. “Loop models in Magnetic Spin Ice crystals” in Deutsche Physikalische Gesellschaft (DPG) Spring Meeting, TU Dresden, Germany (April 2014)
 Jaubert, L. D.C., ”Spin liquids in pyrochlores”, LPTHE, Paris University VI, France (April 2014)
Poster Presentations:
 Benton, J. O., Jaubert, L.D.C., Yan, Han and Shannon, N.”An anisotropic Coulomb liquid on the pyrochlore lattice”. in Novel Quantum States in Condensed Matter 2014 Workshop, YITP, Kyoto University (Nov 2014)
 Ueda, H. T, Akagi, Y. and Shannon, N.”Topological defects on the antiferromagneticSU(3) point in the spin1 bilinearbiquadratic model”, in Novel Quantum States in Condensed Matter 2014 Workshop, YITP, Kyoto University (Nov 2014)
 Akagi, Y., Udagawa, M., and Motome, Y. “Quantum Spin Fluctuations and Magnon Hall Effect in Spin Scalar Chiral Ordered States in a Kondo Lattice System” in Novel Quantum States 2014, YITP, Kyoto University (Nov 2014)
 Ueda, H. T, Akagi, Y. and Shannon, N. “Topological defects in a spinnematic phase on the triangular lattice”, in International Conference on Highly Frustrated Magnetisim, University of Cambridge, UK (July 2014)
 Essafi, K. and Jaubert, L.D.C. “Emergence of Loops in SpinIce” in International Conference on Highly Frustrated Magnetisim, University of Cambridge, UK (July 2014)
 Benton, J. O., Jaubert, L. D.C., Yan, H. and Shannon, N. “An Anisotropic Coulomb Liquid on the Pyrochlore Lattice” in International Conference on Highly Frustrated Magnetisim, University of Cambridge, UK (July 2014)
 Taillefumier, M., Robert, J., Henley, C. L., Moessner, R. and Canals, B. “Semiclassical spin dynamics of the antiferromagnetic Heisenberg model on the kagome lattice”, Grenoble, France (July 2014)
 Ozawa, R., Udagawa, M., Akagi, Y. and Motome, Y. “Langevinbased numerical analysis of frustrated spincharge coupled systems: surface and domain wall states” in SCES 2014, Grenoble, France (July 2014)
 Akagi, Y., Udagawa, M. and Motome, Y. “Quantum Spin Fluctuations and Magnon Hall Effect in Spin Scalar Chiral Ordered States in a Kondo Lattice System” in SCES 2014, Grenoble, France (July 2014)
 Yan, H., Benton, J. O., Jaubert, L. D.C. and Shannon, N., “Effective electromagnetism in rareearth pyrochlore oxides” in OIST International Workshop on Novel Quantum Materials and Phases, OIST Japan (May 2014)
 Pohle, R., Kavousanaki, E., Dani, K. and Shannon, N. ”Growing up in the Spotlight  Optics of Graphene from Dot to Sheet”, in OIST International Workshop on Novel Quantum Materials and Phases, OIST Japan (May 2014)
 Akagi, Y., Udagawa, M. and Motome, Y., “Magnon Hall Effect due to Spin Scalar Chiral Ordering in a Kondo Lattice System” in OIST International Workshop on Novel Quantum Materials and Phases, OIST Japan (May 2014)
 Benton, J. O.,”An anisotropic Coulomb liquid on the pyrochlore lattice” in OIST International Workshop on Novel Quantum Materials and Phases, OIST Japan (May 2014)
5. Intellectual Property Rights and Other Specific Achievements
Nothing to report
6. Meetings and Events
6.1 OIST Workshop
 The OIST International Workshop on Novel Quantum Materials and Phases (NQMP2014)
 Date of workshop : May 14  17, 2014
 Venue: OIST
 Organizers:
 Hiroshi Kageyama (Kyoto University)
 Yukitoshi Motome (University of Tokyo)
 Nic Shannon (OIST)
6.2 Research Visits and Seminars
Prof. Philippe Sindzingre (LPTMC, Université Paris 6)


Dr. Luis Seabra (Israel Institute of Technology)


Dr. Tsutomu Momoi (RIKEN)


Prof. Henrik M. Ronnow (EPFL Lausanne)


Prof. Ian Affleck (The University of British Columbia)


Prof. Oleg Tchernyshyov (The Johns Hopkins University)


Prof. Frank Pollmann (MPIPKS Dresden)


Prof. Andreas Laeuchli (University of Innsbruck)


Dr. Kazuhiro Nawa (ISSP, University of Tokyo)


Prof. Peter Holdsworth (ENS Lyon)


Dr. Masafumi Udagawa (University of Tokyo)


Dr. Andrew Smerald (EPFL Lausanne)


Prof. Nigel Hussey (HFML Nijmegen)


Mr. Johannes Knolle (MPIPKS Dresden)


Prof. Karlo Penc (Institute for solid state for physics and optics)

7. Other
Nothing to report.