File Download

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

진호섭

Jin, Hosub
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Graphene analogue in (111)-oriented BaBiO3 bilayer heterostructures for topological electronics

Author(s)
Kim, RokyeonYu, JaejunJin, Hosub
Issued Date
2018-01
DOI
10.1038/s41598-017-19090-3
URI
https://scholarworks.unist.ac.kr/handle/201301/23236
Fulltext
https://www.nature.com/articles/s41598-017-19090-3
Citation
SCIENTIFIC REPORTS, v.8, pp.555
Abstract
Topological electronics is a new field that uses topological charges as current-carrying degrees of freedom. For topological electronics applications, systems should host topologically distinct phases to control the topological domain boundary through which the topological charges can flow. Due to their multiple Dirac cones and the π-Berry phase of each Dirac cone, graphene-like electronic structures constitute an ideal platform for topological electronics; graphene can provide various topological phases when incorporated with large spin-orbit coupling and mass-gap tunability via symmetry-breaking. Here, we propose that a (111)-oriented BaBiO3 bilayer (BBL) sandwiched between large-gap perovskite oxides is a promising candidate for topological electronics by realizing a gap-tunable, and consequently a topology-tunable, graphene analogue. Depending on how neighboring perovskite spacers are chosen, the inversion symmetry of the BBL heterostructure can be either conserved or broken, leading to the quantum spin Hall (QSH) and quantum valley Hall (QVH) phases, respectively. BBL sandwiched by ferroelectric compounds enables switching of the QSH and QVH phases and generates the topological domain boundary. Given the abundant order parameters of the sandwiching oxides, the BBL can serve as versatile topological building blocks in oxide heterostructures.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
TOTAL-ENERGY CALCULATIONSWAVE BASIS-SETQUANTUMTRANSPORT

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.