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Correlated topological insulator in a triangular lattice

Published on:

11 October 2023

Primary Category:

Strongly Correlated Electrons

Paper Authors:

Kota Ido,

Takahiro Misawa

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Key Details

Noncoplanar triple-Q magnetic order emerges as ground state in triangular Kondo lattice model

Triple-Q state found at quarter filling for intermediate Kondo coupling strength

Many-body Chern number calculated to be 1, confirming triple-Q state is a Chern insulator

First demonstration of magnetic Chern insulator in original quantum Kondo lattice model

Results provide pathway to realizing topological phases in correlated electron systems

AI generated summary

Correlated topological insulator in a triangular lattice

This paper investigates the possibility of a correlated topological insulator called a magnetic Chern insulator in the Kondo lattice model on a triangular lattice. Using variational Monte Carlo simulations, the authors find a noncoplanar triple-Q magnetic ordered phase becomes the ground state at quarter filling for an intermediate Kondo coupling strength. They calculate the many-body Chern number based on polarization operators, showing this triple-Q state has a quantized Chern number of 1, confirming it as a many-body Chern insulator.

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