This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1021/acs.nanolett.5b02299 in citations.
Two-Dimensional Topological Crystalline Insulator and Topological Phase Transition in TlSe and TlS Monolayers
Two-Dimensional Topological Crystalline Insulator and Topological Phase Transition in TlSe and TlS Monolayers
The properties that distinguish topological crystalline insulator (TCI) and topological insulator (TI) rely on crystalline symmetry and time-reversal symmetry, respectively, which encodes different bulk and surface/edge properties. Here, we predict theoretically that electron-doped TlM (M = S and Se...
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Personal Name(s): | Niu, Chengwang (Corresponding author) |
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Buhl, Patrick / Bihlmayer, Gustav / Wortmann, Daniel / Blügel, Stefan / Mokrousov, Yuriy | |
Contributing Institute: |
JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | Nano letters, 15 (2015) 9, S. 6071 - 6075 |
Imprint: |
Washington, DC
ACS Publ.
2015
|
DOI: |
10.1021/acs.nanolett.5b02299 |
PubMed ID: |
26241305 |
Document Type: |
Journal Article |
Research Program: |
Magnetic Anisotropy of Metallic Layered Systems and Nanostructures Controlling Configuration-Based Phenomena Controlling Spin-Based Phenomena |
Publikationsportal JuSER |
The properties that distinguish topological crystalline insulator (TCI) and topological insulator (TI) rely on crystalline symmetry and time-reversal symmetry, respectively, which encodes different bulk and surface/edge properties. Here, we predict theoretically that electron-doped TlM (M = S and Se) (110) monolayers realize a family of two-dimensional (2D) TCIs characterized by mirror Chern number CM = −2. Remarkably, under uniaxial strain (≈ 1%), a topological phase transition between 2D TCI and 2D TI is revealed with the calculated spin Chern number CS = −1 for the 2D TI. Using spin-resolved edge states analysis, we show different edge-state behaviors, especially at the time reversal invariant points. Finally, a TlBiSe2/NaCl quantum well is proposed to realize an undoped 2D TCI with inverted gap as large as 0.37 eV, indicating the high possibility for room-temperature observation. |