Materials Design from Nonequilibrium Steady States: Driven Graphene as a Tunable Semiconductor with Topological Properties
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Iadecola-2013-Materials design from nonequilibrium steady states.pdf
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Author(s)
Iadecola, Thomas
Campbell, David
Chamon, Claudio
Hou, Chang-Yu
Jackiw, Roman
Pi, So-Young
Kusminskiy, Silvia Viola
Date Issued
April 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Iadecola, Thomas, David Campbell, Claudio Chamon, Chang-Yu Hou, Roman Jackiw, So-Young Pi, and Silvia Viola Kusminskiy. Materials Design from Nonequilibrium Steady States: Driven Graphene as a Tunable Semiconductor with Topological Properties. Physical Review Letters 110, no. 17 (April 2013). © 2013 American Physical Society.
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Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.176603
