Qu, Fanming and Beukman, Arjan J. A. and Nadj-Perge, Stevan and Wimmer, Michael and Nguyen, Binh-Minh and Yi, Wei and Thorp, Jacob and Sokolich, Marko and Kiselev, Andrey A. and Manfra, Michael J. and Marcus, Charles M. and Kouwenhoven, Leo P. (2015) Electric and Magnetic Tuning Between the Trivial and Topological Phases in InAs/GaSb Double Quantum Wells. Physical Review Letters, 115 (3). Art. No. 036803. ISSN 0031-9007. doi:10.1103/PhysRevLett.115.036803. https://resolver.caltech.edu/CaltechAUTHORS:20160112-140347480
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Abstract
Among the theoretically predicted two-dimensional topological insulators, InAs/GaSb double quantum wells (DQWs) have a unique double-layered structure with electron and hole gases separated in two layers, which enables tuning of the band alignment via electric and magnetic fields. However, the rich trivial-topological phase diagram has yet to be experimentally explored. We present an in situ and continuous tuning between the trivial and topological insulating phases in InAs/GaSb DQWs through electrical dual gating. Furthermore, we show that an in-plane magnetic field shifts the electron and hole bands relatively to each other in momentum space, functioning as a powerful tool to discriminate between the topologically distinct states.
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| Additional Information: | © 2015 American Physical Society. Received 18 February 2015; published 15 July 2015. We gratefully acknowledge Folkert de Vries, Rafal Skolasinski, Fabrizio Nichele, Morten Kjærgaard, and Henri Suominen for very helpful discussions. This work has been supported by funding from the Netherlands Foundation for Fundamental Research on Matter (FOM), Microsoft Corporation Station Q, and Danish National Research Foundation. S. N-P. acknowledges support of the European Community through the Marie Curie Fellowship (IOF 302937). F. Q. and A. J. A. B. contributed equally to this work. | ||||||||||
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| Issue or Number: | 3 | ||||||||||
| Classification Code: | PACS numbers: 73.21.Fg, 71.30.+h, 72.80.Ey | ||||||||||
| DOI: | 10.1103/PhysRevLett.115.036803 | ||||||||||
| Record Number: | CaltechAUTHORS:20160112-140347480 | ||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20160112-140347480 | ||||||||||
| Official Citation: | Electric and Magnetic Tuning Between the Trivial and Topological Phases in InAs/GaSb Double Quantum Wells Fanming Qu, Arjan J. A. Beukman, Stevan Nadj-Perge, Michael Wimmer, Binh-Minh Nguyen, Wei Yi, Jacob Thorp, Marko Sokolich, Andrey A. Kiselev, Michael J. Manfra, Charles M. Marcus, and Leo P. Kouwenhoven Phys. Rev. Lett. 115, 036803 (2015) – Published 15 July 2015 | ||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
| ID Code: | 63600 | ||||||||||
| Collection: | CaltechAUTHORS | ||||||||||
| Deposited By: | Ruth Sustaita | ||||||||||
| Deposited On: | 12 Jan 2016 22:31 | ||||||||||
| Last Modified: | 10 Nov 2021 23:18 |
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