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Title: Orbital magnetization of Floquet topological systems

Abstract

A general expression for the orbital magnetization of a Floquet system is derived. The expression holds for a clean system, and is valid for any driving protocol, and arbitrary occupation of the bands. The orbital magnetization is shown to be large not only for Chern insulators, but also for anomalous phases where the Chern number does not fully account for the topology. In addition, the orbital magnetization is shown to take significant values both for a thermal equilibrium occupation of the Floquet bands, and for occupations determined by a quantum quench from an initial state with zero orbital magnetization. For the latter case, the orbital magnetization is shown to be highly sensitive to van Hove singularities of the Floquet bands.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [3]
  1. Aalto Univ., Otaniemi (Finland)
  2. RWTH Aachen Univ. (Germany); Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)
  3. New York Univ. (NYU), NY (United States). Dept. of Physics
Publication Date:
Research Org.:
New York Univ. (NYU), NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1869395
Grant/Contract Number:  
SC0010821
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 105; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Chern insulators; Magnetization dynamics

Citation Formats

Topp, Gabriel E., Törmä, Päivi, Kennes, Dante M., and Mitra, Aditi. Orbital magnetization of Floquet topological systems. United States: N. p., 2022. Web. doi:10.1103/physrevb.105.195426.
Topp, Gabriel E., Törmä, Päivi, Kennes, Dante M., & Mitra, Aditi. Orbital magnetization of Floquet topological systems. United States. https://doi.org/10.1103/physrevb.105.195426
Topp, Gabriel E., Törmä, Päivi, Kennes, Dante M., and Mitra, Aditi. Mon . "Orbital magnetization of Floquet topological systems". United States. https://doi.org/10.1103/physrevb.105.195426. https://www.osti.gov/servlets/purl/1869395.
@article{osti_1869395,
title = {Orbital magnetization of Floquet topological systems},
author = {Topp, Gabriel E. and Törmä, Päivi and Kennes, Dante M. and Mitra, Aditi},
abstractNote = {A general expression for the orbital magnetization of a Floquet system is derived. The expression holds for a clean system, and is valid for any driving protocol, and arbitrary occupation of the bands. The orbital magnetization is shown to be large not only for Chern insulators, but also for anomalous phases where the Chern number does not fully account for the topology. In addition, the orbital magnetization is shown to take significant values both for a thermal equilibrium occupation of the Floquet bands, and for occupations determined by a quantum quench from an initial state with zero orbital magnetization. For the latter case, the orbital magnetization is shown to be highly sensitive to van Hove singularities of the Floquet bands.},
doi = {10.1103/physrevb.105.195426},
journal = {Physical Review. B},
number = 19,
volume = 105,
place = {United States},
year = {Mon May 23 00:00:00 EDT 2022},
month = {Mon May 23 00:00:00 EDT 2022}
}

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