Exotic topological insulator states and topological phase transitions in Sb 2Se 3-Bi 2Se 3 heterostructures

Handle URI:
http://hdl.handle.net/10754/562135
Title:
Exotic topological insulator states and topological phase transitions in Sb 2Se 3-Bi 2Se 3 heterostructures
Authors:
Zhang, Qianfan; Zhang, Zhiyong; Zhu, Zhiyong; Schwingenschlögl, Udo ( 0000-0003-4179-7231 ) ; Cui, Yi
Abstract:
Topological insulator is a new state of matter attracting tremendous interest due to its gapless linear dispersion and spin momentum locking topological states located near the surface. Heterostructures, which have traditionally been powerful in controlling the electronic properties of semiconductor devices, are interesting for topological insulators. Here, we studied the spatial distribution of the topological state in Sb 2Se 3-Bi 2Se 3 heterostructures by first-principle simulation and discovered that an exotic topological state exists. Surprisingly, the state migrates from the nontrivial Bi 2Se 3 into the trivial Sb 2Se 3 region and spreads across the entire Sb 2Se 3 slab, extending beyond the concept of "surface" state while preserving all of the topological surface state characteristics. This unusual topological state arises from the coupling between different materials and the modification of electronic structure near Fermi energy. Our study demonstrates that heterostructures can open up opportunities for controlling the real-space distribution of the topological state and inducing quantum phase transitions between topologically trivial and nontrivial states. © 2012 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Core Labs; Computational Physics and Materials Science (CPMS)
Publisher:
American Chemical Society
Journal:
ACS Nano
Issue Date:
27-Mar-2012
DOI:
10.1021/nn2045328
Type:
Article
ISSN:
19360851
Sponsors:
Y.C. acknowledges the support from the Keck Foundation, DARPA MESO project (No. N66001-11-1-4105) and King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12). The authors acknowledge the National Energy Research Scientific Computing Center (NERSC) and KAUST for computer time. Z.Z. acknowledges partial support from National Nanotechnology Infrastructure Network (NNIN).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Computational Physics and Materials Science (CPMS)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Qianfanen
dc.contributor.authorZhang, Zhiyongen
dc.contributor.authorZhu, Zhiyongen
dc.contributor.authorSchwingenschlögl, Udoen
dc.contributor.authorCui, Yien
dc.date.accessioned2015-08-03T09:45:36Zen
dc.date.available2015-08-03T09:45:36Zen
dc.date.issued2012-03-27en
dc.identifier.issn19360851en
dc.identifier.doi10.1021/nn2045328en
dc.identifier.urihttp://hdl.handle.net/10754/562135en
dc.description.abstractTopological insulator is a new state of matter attracting tremendous interest due to its gapless linear dispersion and spin momentum locking topological states located near the surface. Heterostructures, which have traditionally been powerful in controlling the electronic properties of semiconductor devices, are interesting for topological insulators. Here, we studied the spatial distribution of the topological state in Sb 2Se 3-Bi 2Se 3 heterostructures by first-principle simulation and discovered that an exotic topological state exists. Surprisingly, the state migrates from the nontrivial Bi 2Se 3 into the trivial Sb 2Se 3 region and spreads across the entire Sb 2Se 3 slab, extending beyond the concept of "surface" state while preserving all of the topological surface state characteristics. This unusual topological state arises from the coupling between different materials and the modification of electronic structure near Fermi energy. Our study demonstrates that heterostructures can open up opportunities for controlling the real-space distribution of the topological state and inducing quantum phase transitions between topologically trivial and nontrivial states. © 2012 American Chemical Society.en
dc.description.sponsorshipY.C. acknowledges the support from the Keck Foundation, DARPA MESO project (No. N66001-11-1-4105) and King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12). The authors acknowledge the National Energy Research Scientific Computing Center (NERSC) and KAUST for computer time. Z.Z. acknowledges partial support from National Nanotechnology Infrastructure Network (NNIN).en
dc.publisherAmerican Chemical Societyen
dc.subjectfirst-principle simulationen
dc.subjectheterostructureen
dc.subjectquantum phase transitionen
dc.subjectspin-orbit couplingen
dc.subjecttopological insulatoren
dc.subjecttopological stateen
dc.titleExotic topological insulator states and topological phase transitions in Sb 2Se 3-Bi 2Se 3 heterostructuresen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentCore Labsen
dc.contributor.departmentComputational Physics and Materials Science (CPMS)en
dc.identifier.journalACS Nanoen
dc.contributor.institutionDepartment of Material Sciences and Engineering, Stanford University, Stanford, CA 94305, United Statesen
dc.contributor.institutionStanford Nanofabrication Facility, Stanford University, Stanford, CA 94305, United Statesen
dc.contributor.institutionStanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, United Statesen
kaust.authorZhu, Zhiyongen
kaust.authorSchwingenschlögl, Udoen
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