Universität zu Köln

Kim, Kun Woo, Andreanov, Alexei ORCID: 0000-0002-3033-0452 and Flach, Sergej (2020). Anomalous transport in a topological Wannier-Stark ladder. Phys. Rev. Res., 2 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2643-1564

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Abstract

A dc (e.g., electric) field with commensurate lattice direction turns a single-particle band structure in d = 3 dimensions into an infinite set of equally spaced irreducible (d - 1) = 2-dimensionalWannier-Stark (WS) band structures that are spatially localized along the field direction. Particle transport is expected to be suppressed once the WS bands are gapped in energy. The topological character of the irreducible band structure leads to one-dimensional sets of boundary states which fill the energy gaps. As a result, eigenmodes are smoothly connected in energy and space and yield anomalous particle transport throughout the ladder. The number of chiral boundary modes can be tuned by the dc field strength and manifests through the distribution of dissipated energy and spatial motion, and the temperature dependence of angular momentum carried by particles.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kim, Kun Woo UNSPECIFIED UNSPECIFIED UNSPECIFIED Andreanov, Alexei UNSPECIFIED orcid.org/0000-0002-3033-0452 UNSPECIFIED Flach, Sergej UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-336633
DOI:	10.1103/PhysRevResearch.2.023067
Journal or Publication Title:	Phys. Rev. Res.
Volume:	2
Number:	2
Date:	2020
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2643-1564
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BLOCH OSCILLATIONS; SPIN; LOCALIZATION Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33663