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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. doi:10.1103/PhysRevB.88.075144.

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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.

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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:Institute for Quantum Information and Matter
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
Issue or Number:7
Classification Code:PACS: 72.40.+w, 72.25.Fe, 72.10.Bg
Record Number:CaltechAUTHORS:20131003-112718407
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41657
Deposited By: Tony Diaz
Deposited On:03 Oct 2013 20:53
Last Modified:10 Nov 2021 04:32

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