Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.176603
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Funding
- DOE [DEF-06ER46316, DEF-91ER40676]
- DARPA-QuEST program
- Deutsche Forschungsgemeinschaft [SPP 1459]
- Alexander von Humboldt Foundation
- KITP [NSF PHY11-25915]
- Division Of Physics [1125565] Funding Source: National Science Foundation
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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. DOI: 10.1103/PhysRevLett.110.176603
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