Electronic interaction in condensed matter systems is the main focus of my research. Fundamental changes in materials properties such as phase transition controlled by external conditions is the main theme. With today’s advancement in nanotechnology, the external electric bias applied on nanoscale devices opens up new realm of physics questions which had been non-questions a few decades ago. The examples are transformation of collective states such as resistive phase transitions through electron-electron interaction, or disorder-driven localization when driven by external electric field. Most work involves close collaboration with experimentalists. My group uses theoretical techniques such as analytic and numerical diagrammatic methods with Green’sfunctions, and fully numerical methods such as quantum Monte Carlo method, exact-diagonalization.
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