Seminar : Exotic superconducting states in FeSe-based materials investigated by spectroscopic-imaging scanning tunneling microscopy

Speaker

Dr. Tetsuo Hanaguri / RIKEN Center for Emergent Matter Science

Tetsuo Hanaguri obtained PhD from Tohoku University in 1993. Before joining RIKEN in 2004, he was working at the University of Tokyo as a research associate and an associate professor. His research field is experimental condensed-matter physics. Currently he is focusing on spectroscopic-imaging scanning tunneling microscopy on emergent materials such as unconventional superconductors and topological materials.

Title

Exotic superconducting states in FeSe-based materials investigated by spectroscopic-imaging scanning tunneling microscopy

Abstract

FeSe is a simple binary iron-based superconductor but exhibits wide variety of unusual properties such as anisotropic superconducting gap, BCS-BEC crossover behavior, and so-called electronic nematicity. Substitution of isovalent chalcogen atoms (S or Te) for Se induces even more exotic superconducting states. We have applied spectroscopic-imaging scanning tunneling microscopy to investigate electronic states underlying these phenomena. I will briefly review the material and the technique, and will discuss possible “ultranodal” superconducting state in Fe(Se,S) and Majorana bound state in Fe(Se,Te).

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Meeting ID: 992 0625 0583 (For password, please contact : megumi.ikeda@oist.jp)