This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1088/2053-1583/3/2/025037 in citations.
Two-dimensional topological crystalline insulator phase in quantum wells of trivial insulators
Two-dimensional topological crystalline insulator phase in quantum wells of trivial insulators
The realization of two-dimensional (2D) topological insulators (TIs) in HgTe/CdTe quantum wells (QWs) has generated an explosion of research on TIs and novel topologically nontrivial phases. Here we predict, based on first-principles calculations, that the newly discovered 2D topological crystalline...
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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 - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 Quanten-Theorie der Materialien; IAS-1 |
Published in: | 2D Materials, 3 (2016) 2, S. 025037 |
Imprint: |
Bristol
IOP Publ.
2016
|
DOI: |
10.1088/2053-1583/3/2/025037 |
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 realization of two-dimensional (2D) topological insulators (TIs) in HgTe/CdTe quantum wells (QWs) has generated an explosion of research on TIs and novel topologically nontrivial phases. Here we predict, based on first-principles calculations, that the newly discovered 2D topological crystalline insulators (TCIs) phase exists even in the QWs of trivial insulators, e.g. (Sn/Pb)Te and Na(Cl/Br), with mirror Chern number ${n}_{{\rm{M}}}=-2$. Tunable nontrivial energy gaps ranging from 4 to 238 meV are obtained, guaranteeing further room-temperature observations and applications. The combined effect of strain and electrostatic interaction that can be engineered by the cladding layers leads to a band inversion, resulting in the phase transition from trivial insulator to 2D TCIs. Our work provides a new strategy for engineering topological states in 2D materials. |