Lindner, Netanel H. and Bergman, Doron L. and Refael, Gil and Galitski, Victor (2011) Topological Floquet Spectrum in Three Dimensions via a Two-Photon Resonance. California Institute of Technology , Pasadena, CA. (Submitted) http://resolver.caltech.edu/CaltechAUTHORS:20120515-144047298
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A recent theoretical work [Nature Phys., 7, 490 (2011)] has demonstrated that external non-equilibrium perturbations may be used to convert a two-dimensional semiconductor, initially in a topologically trivial state, into a Floquet topological insulator. Here, we develop a non-trivial extension of these ideas to three-dimensional systems. In this case, we show that a two-photon resonance may provide the necessary twist needed to transform an initially unremarkable band structure into a topological Floquet spectrum. We provide both an intuitive, geometrical, picture of this phenomenon and also support it by an exact solution of a realistic lattice model that upon irradiation features single topological Dirac modes at the two-dimensional boundary of the system. It is shown that the surface spectrum can be controlled by choosing the polarization and frequency of the driving electromagnetic field. Specific experimental realizations of a three-dimensional Floquet topological insulator are proposed.
|Item Type:||Report or Paper (Discussion Paper)|
|Additional Information:||We thank Joseph Avron, Erez Berg, Daniel Podolsky, and John Preskill for helpful discussions. VG was supported by NSF CAREER award. NL was supported by the Gordon and Betty Moore Foundation and NSF through Caltech's Institute of Quantum Information and Matter, and by the National Science Foundation under Grant No. PHY-0803371. DLB was supported by the Sherman Fairchild foundation. GR and VG acknowledge support from DARPA. We are also grateful for the hospitality of the Aspen Physics Center where part of this work was done. We also acknowledge hospitality of the KITP and the National Science Foundation under Grant No. NSF PHY05-51164.|
|Group:||IQIM, Institute for Quantum Information and Matter|
|Subject Keywords:||Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||27 Jun 2012 18:36|
|Last Modified:||26 Dec 2012 15:12|
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