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Electric-field-induced <i>Z</i> <sub>2</sub> topological phase transition in strained single bilayer Bi(111)
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Description
For controlling the critical electric fields of the topological phase transition in single bilayer Bi(111), we investigated topological phases in a strained system through first-principles calculations. We found a quadratic band touching semimetallic state at tensile strain $��=0.5$%. Around this strain, the topological phase can be switched to a trivial insulator by an infinitesimal electric field. The positions at which Dirac cones appear in the electric-field-induced topological phase transition changed for the strain $��>0.5$% and $��<0.5$%. Our results indicate that this topological phase transition could be applied to novel spintronic devices.
Journal
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- Applied Physics Express
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Applied Physics Express 12 (7), 075009-, 2019-06-18
IOP Publishing
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Keywords
Details 詳細情報について
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- CRID
- 1360003449883238528
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- NII Article ID
- 210000156449
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- ISSN
- 18820786
- 18820778
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- Article Type
- journal article
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- Data Source
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- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE