Seminar by Prof. Yoshio KURAMOTO "How to distinguish between itinerant and localized electrons in solids: Mott vs Kondo"

Dear all,

Mathematical and Theoretical Physics Unit (Hikami Unit) would like to invite you to a seminar by Prof. Yoshio  KURAMOTO.

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Date: Thursday, June 27th

Time: 16:00 – 17:00

Venue: C015, Lab1

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Speaker: Prof. Yoshio KURAMOTO

Professor, Department of Physics, Tohoku University, Sendai, JAPAN

Title: How to distinguish between itinerant and localized electrons in solids: Mott vs Kondo

Abstract: In elementary theory of solids, we learn that electrons form energy bands by the periodic potential.  Mott argued many years ago that the electron-electron repulsion may break the energy bands, and can localize electrons at each lattice site.  The ensuing non-conducting state is now called the Mott insulator.  One may ask what happens when the Mott insulator is doped, or when the repulsion becomes weaker.  This question seems fundamental to understanding many interesting phenomena in condensed matter, including high-temperature superconductivity and heavy electrons where the Kondo effect plays an essential role.  Using highly accurate numerical theory and recent experimental results, we obtain a fresh insight into the duality of electrons, and expect some exotic electronic states.