Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.236803
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Funding
- NSF [DMR-1005035]
- US-Israel Binational Science Foundation
- College of Arts and Science
- Offices of the Vice President for Research
- Vice Provost for Research at Indiana University through the Faculty Research Support Program
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We develop a theory of topological transitions in a Floquet topological insulator, using graphene irradiated by circularly polarized light as a concrete realization. We demonstrate that a hallmark signature of such transitions in a static system, i.e., metallic bulk transport with conductivity of order e(2)/h, is substantially suppressed at some Floquet topological transitions in the clean system. We determine the conditions for this suppression analytically and confirm our results in numerical simulations. Remarkably, introducing disorder dramatically enhances this transport by several orders of magnitude.
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