CNQM2023: Yashar Komijani - Dynamic Mass Generation & Topological Order in Overscreen Kondo Lattices скачать в хорошем качестве

CNQM2023: Yashar Komijani - Dynamic Mass Generation & Topological Order in Overscreen Kondo Lattices

Yashar Komijani (University of Cincinnati) - Dynamic Mass Generation and Topological Order in Overscreened Kondo Lattices It has been predicted that multichannel Kondo lattices undergo a symmetry breaking at low temperatures. We use the dynamical large-N technique to as certain this prediction in a microscopic model on a honeycomb lattice and find out that it is not generally true. Rather, we find a 2+1D conformally invariant fixed point, governed by critical exponents that are found numerically. When we break time-reversal symmetry by adding a Haldane mass to the conduction elections, three phases, separated by continuous transitions, are discernible; one characterized by dynamic mass generation and spontaneous breaking of the channel symmetry, one where topological defects restore channel symmetry but preserve the gap, and one with a Kondo-coupled chiral spin-liquid. We argue that the latter phase, is a fractional Chern insulator with anyonic excitations. Workshop “Correlations in Novel Quantum Materials CNQM2023” (https://www.fkf.mpg.de/cnqm2023) Held at Max-Planck Institute for Solid State Research, Stuttgart, Germany 24-28th July 2023 We acknowledge the generous support of the Max-Planck-Institute for Solid State Research and ICAM.