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Topological edge-state engineering with high-frequency electromagnetic radiation
ITMO University, Saint Petersburg, Russia; Division of Physics and Applied Physics, Nanyang Technological University, Singapore, Singapore.
ITMO University, Saint Petersburg, Russia.
ITMO University, Saint Petersburg, Russia; Division of Physics and Applied Physics, Nanyang Technological University, Singapore, Singapore.
Örebro University, School of Science and Technology. Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden.
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, no 20, 205127Article in journal (Refereed) Published
Abstract [en]

We outline here how strong light-matter interaction can be used to induce quantum phase transition between normal and topological phases in two-dimensional topological insulators. We consider the case of a HgTe quantum well, in which band inversion occurs above a critical value of the well thickness, and demonstrate that coupling between electron states and the E field from an off-resonant linearly polarized laser provides a powerful tool to control topological transitions, even for a thickness of the quantum well that is below the critical value. We also show that topological phase properties of the edge states, including their group velocity, can be tuned in a controllable way by changing the intensity of the laser field. These findings open up the possibility for new experimental means with which to investigate topological insulators and shed new light on topological-insulator-based technologies that are under active discussion.

Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 96, no 20, 205127
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-62837DOI: 10.1103/PhysRevB.96.205127ISI: 000415169500002OAI: oai:DiVA.org:oru-62837DiVA: diva2:1160562
Funder
Swedish Research Council
Note

Funding Agencies:

Russian Academic Excellence Project "5-100"  

Ministry of Education and Science of the Russian Federation  3.1365.2017/4.6  3.8884.2017/8.9  3.4424.2017/HM  3.2614.2017/4.6 

Icelandic research fund (Rannis)  163082-051 

RFBR Project  16-32-60040  16-32-60123 

KAW foundation  2012.0031  2013.0020 

eSSENCE  

Horizon project NOTEDEV  

Horizon project CoExAN     14.Y26.31.0015 

Available from: 2017-11-27 Created: 2017-11-27 Last updated: 2017-11-29Bibliographically approved

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Eriksson, Olle

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