Published April 25, 2013
| Published
Journal Article
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Materials Design from Nonequilibrium Steady States: Driven Graphene as a Tunable Semiconductor with Topological Properties
Abstract
Controlling the properties of materials by driving them out of equilibrium is an exciting prospect that has only recently begun to be explored. In this Letter we give a striking theoretical example of such materials design: a tunable gap in monolayer graphene is generated by exciting a particular optical phonon. We show that the system reaches a steady state whose transport properties are the same as if the system had a static electronic gap, controllable by the driving amplitude. Moreover, the steady state displays topological phenomena: there are chiral edge currents, which circulate a fractional charge e/2 per rotation cycle, with the frequency set by the optical phonon frequency.
Additional Information
© 2013 American Physical Society. Received 11 February 2013; published 25 April 2013. We thank Jerome Dorignac, who participated in an early stage of this investigation, for useful discussions. We also acknowledge helpful conversations with Michael El-Batanouny, Bennett Goldberg, Colin Howard, Alex Kitt, Sebastian Remi, and Anna Swan. This work is supported by DOE Grants No. DEF-06ER46316 (C. C.) and No. DEF-91ER40676 (S.-Y. P.), by the DARPA QuEST program (C.-Y. H.), and by the Deutsche Forschungsgemeinschaft SPP 1459 and the Alexander von Humboldt Foundation (S.V. K.). D. C. and S.V. K. acknowledge the hospitality of the KITP, through Grant No. NSF PHY11-25915, during its ''Physics of Graphene'' program.Attached Files
Published - PhysRevLett.110.176603.pdf
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PhysRevLett.110.176603.pdf
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Additional details
- Eprint ID
- 38841
- Resolver ID
- CaltechAUTHORS:20130606-143733284
- DEF-06ER46316
- Department of Energy (DOE)
- DEF-91ER40676
- Department of Energy (DOE)
- DARPA-QuEST Program
- SPP 1459
- Deutsche Forschungsgemeinschaft (DFG)
- Alexander von Humboldt Foundation
- PHY11-25915
- NSF
- Created
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2013-06-14Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field