Published August 30, 2013
| Submitted + Published
Journal Article
Open
Photocurrent response of topological insulator surface states
- Creators
- Junck, Alexandra
- Refael, Gil
- von Oppen, Felix
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.
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).Attached Files
Published - PhysRevB.88.075144.pdf
Submitted - 1301.4392v1.pdf
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1301.4392v1.pdf
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Additional details
- Eprint ID
- 41657
- Resolver ID
- CaltechAUTHORS:20131003-112718407
- Helmholtz Virtual Institute
- Defense Advanced Research Projects Agency (DARPA)
- Institute for Quantum Information and Matter (IQIM)
- Moore Foundationdon and Betty Moore Foundation
- Humboldt Foundation
- Created
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2013-10-03Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter