Quantum Hall edge states in topological insulator nanoribbons
Abstract
We present a microscopic theory of the chiral one-dimensional electron gas system localized on the sidewalls of magnetically doped Bi2Se3-family topological insulator nanoribbons in the quantum anomalous Hall effect (QAHE) regime. Our theory is based on a simple continuum model of sidewall states whose parameters are extracted from detailed ribbon and film geometry tight-binding model calculations. In contrast to the familiar case of the quantum Hall effect in semiconductor quantum wells, the number of microscopic chiral channels depends simply and systematically on the ribbon thickness and on the position of the Fermi level within the surface state gap. Further, we use our theory to interpret recent transport experiments that exhibit nonzero longitudinal resistance in samples with accurately quantized Hall conductances.
- Authors:
-
- Linnæus University, Kalmar (Sweden)
- Univ. of Texas, Austin, TX (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Swedish Research Council (VR); Welch Foundation
- OSTI Identifier:
- 1470265
- Alternate Identifier(s):
- OSTI ID: 1326863
- Grant/Contract Number:
- SC0012670; 621-2014-4785; F-1473
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 12; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; 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; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
Citation Formats
Pertsova, A., Canali, C. M., and MacDonald, A. H. Quantum Hall edge states in topological insulator nanoribbons. United States: N. p., 2016.
Web. doi:10.1103/physrevb.94.121409.
Pertsova, A., Canali, C. M., & MacDonald, A. H. Quantum Hall edge states in topological insulator nanoribbons. United States. https://doi.org/10.1103/physrevb.94.121409
Pertsova, A., Canali, C. M., and MacDonald, A. H. Mon .
"Quantum Hall edge states in topological insulator nanoribbons". United States. https://doi.org/10.1103/physrevb.94.121409. https://www.osti.gov/servlets/purl/1470265.
@article{osti_1470265,
title = {Quantum Hall edge states in topological insulator nanoribbons},
author = {Pertsova, A. and Canali, C. M. and MacDonald, A. H.},
abstractNote = {We present a microscopic theory of the chiral one-dimensional electron gas system localized on the sidewalls of magnetically doped Bi2Se3-family topological insulator nanoribbons in the quantum anomalous Hall effect (QAHE) regime. Our theory is based on a simple continuum model of sidewall states whose parameters are extracted from detailed ribbon and film geometry tight-binding model calculations. In contrast to the familiar case of the quantum Hall effect in semiconductor quantum wells, the number of microscopic chiral channels depends simply and systematically on the ribbon thickness and on the position of the Fermi level within the surface state gap. Further, we use our theory to interpret recent transport experiments that exhibit nonzero longitudinal resistance in samples with accurately quantized Hall conductances.},
doi = {10.1103/physrevb.94.121409},
journal = {Physical Review B},
number = 12,
volume = 94,
place = {United States},
year = {Mon Sep 26 00:00:00 EDT 2016},
month = {Mon Sep 26 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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