Mechanism for Hall conductance of two-band systems against decoherence

H. Z. Shen, Hong Li, Y. F. Peng, and X. X. Yi
Phys. Rev. E 95, 042129 – Published 17 April 2017

Abstract

The Kubo formula expresses a linear response of the quantum system to weak classical fields. Previous studies showed that the environment degrades the quantum Hall conductance. By studying the dynamics of dissipative two-band systems, in this paper we find that the formation of system-environment bound states is responsible for the Hall conductance immune to the effect of the environment. The bound states can form only when the system-environment couplings are below a threshold. Our results may be of both theoretical and experimental interest in exploring dissipative topological insulators in realistic situations, and may open new perspectives for designing active quantum Hall devices working in realistic environments.

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  • Received 15 January 2017
  • Revised 15 March 2017

DOI:https://doi.org/10.1103/PhysRevE.95.042129

©2017 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & Thermodynamics

Authors & Affiliations

H. Z. Shen1,2, Hong Li1, Y. F. Peng1, and X. X. Yi1,2,*

  • 1Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China
  • 2Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China

  • *yixx@nenu.edu.cn

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Vol. 95, Iss. 4 — April 2017

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