Universität zu Köln

Fujimoto, Manato, Koschke, Henri ORCID: 0000-0001-9702-4196 and Koshino, Mikito (2020). Topological charge pumping by a sliding moire pattern. Phys. Rev. B, 101 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We study the adiabatic topological charge pumping driven by interlayer sliding in the moire superlattices. We show that, when we slide a single layer of the twisted bilayer system relatively to the other, a moire 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Fujimoto, Manato UNSPECIFIED UNSPECIFIED UNSPECIFIED Koschke, Henri UNSPECIFIED orcid.org/0000-0001-9702-4196 UNSPECIFIED Koshino, Mikito UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-348194
DOI:	10.1103/PhysRevB.101.041112
Journal or Publication Title:	Phys. Rev. B
Volume:	101
Number:	4
Date:	2020
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DIRAC FERMIONS; GRAPHENE; ELECTRONS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34819