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Photocurrent response of topological insulator surface states

Junck, Alexandra and Refael, Gil and von Oppen, Felix (2013) Photocurrent response of topological insulator surface states. Physical Review B, 88 (7). Art. No. 075144 . ISSN 1098-0121. http://resolver.caltech.edu/CaltechAUTHORS:20131003-112718407

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Abstract

We study the photocurrent response of topological insulator surface states to circularly polarized light for arbitrary oblique incidence. We describe the surface states within a Dirac model, including several perturbations such as hexagonal warping, nonlinear corrections to the mode velocity, and applied magnetic fields. We find that the photogalvanic current is strongly suppressed for the usual orbital coupling, prompting us to include the weaker Zeeman coupling. We find that the helicity-independent photocurrent dominates over the helicity-dependent contributions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1301.4392arXivDiscussion Paper
http://dx.doi.org/10.1103/PhysRevB.88.075144 DOIArticle
http://link.aps.org/doi/10.1103/PhysRevB.88.075144PublisherArticle
Additional Information:© 2013 American Physical Society. Received 12 March 2013; published 30 August 2013. We thank D. Hsieh for discussions and acknowledge financial support through the Helmholtz Virtual Institute “New States of Matter and Their Excitations” (Berlin) as well as DARPA, the IQIM, an NSF institute supported by the Moore Foundation, and the Humboldt Foundation (Pasadena).
Group:IQIM, Institute for Quantum Information and Matter
Funders:
Funding AgencyGrant Number
Helmholtz Virtual InstituteUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Moore Foundationdon and Betty Moore FoundationUNSPECIFIED
Humboldt FoundationUNSPECIFIED
Classification Code:PACS: 72.40.+w, 72.25.Fe, 72.10.Bg
Record Number:CaltechAUTHORS:20131003-112718407
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20131003-112718407
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41657
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 Oct 2013 20:53
Last Modified:03 Oct 2013 20:53

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