Phys. Rev. B 101, 041112(R) (2020) - Topological charge pumping by a sliding moir\'e pattern

Rapid Communication

Topological charge pumping by a sliding moiré pattern

Manato Fujimoto, Henri Koschke, and Mikito Koshino

Phys. Rev. B 101, 041112(R) – Published 28 January 2020

Abstract

We study the adiabatic topological charge pumping driven by interlayer sliding in the moiré superlattices. We show that, when we slide a single layer of the twisted bilayer system relatively to the other, a moiré pattern flow and a quantized transport of electrons occur. The number of pumped charges is quantized to a sliding Chern number, which is related to the interlayer sliding degree of freedom. In the twisted bilayer graphene, the topological pumping current flows perpendicularly to the sliding direction when the Fermi energy is in the energy gap above or below the nearly-flat bands.

Received 16 October 2019

DOI:https://doi.org/10.1103/PhysRevB.101.041112

©2020 American Physical Society

Physics Subject Headings (PhySH)

Quantum state transfer Topological phases of matter

Bilayer films Graphene

Tight-binding model

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Manato Fujimoto ¹, Henri Koschke ^1,2, and Mikito Koshino¹

¹Department of Physics, Osaka University, Osaka 560-0043, Japan
²Department of Physics, University of Cologne, 50923 Cologne, Germany

See Also

Topological sliding moiré heterostructure

Ying Su and Shi-Zeng Lin

Phys. Rev. B 101, 041113(R) (2020)

Topological charge pumping in twisted bilayer graphene

Yinhan Zhang, Yang Gao, and Di Xiao

Phys. Rev. B 101, 041410(R) (2020)

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 101, Iss. 4 — 15 January 2020

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Sign up to receive regular email alerts from Physical Review B