00733nas a2200217 4500008004100000245011300041210006900154260003400223100001800257700001800275700001900293700002100312700001900333700002300352700002000375700001700395700002000412700002000432700001400452856004900466 2012 eng d00aMulti-component response in multilayer graphene revealed through terahertz and infrared magneto-spectroscopy0 aMulticomponent response in multilayer graphene revealed through aWollongong, Australiac9/20121 aEllis, C., T.1 aStier, A., V.1 aGeorge, D., K.1 aTischler, J., G.1 aGlaser, E., R.1 aMyers-Ward, R., L.1 aTedesco, J., L.1 aEddy, C., R.1 aGaskill, D., K.1 aMarkelz, A., G.1 aCerne, J. uhttps://markelz.physics.buffalo.edu/node/30701418nas a2200289 4500008004500000020001400045245011000059210006900169260000800238300000600246490000800252520061600260653001100876653001200887100002000899700001800919700001200937700001900949700001900968700001500987700001101002700001401013700002001027700001101047700002101058856004901079 2012 Engldsh a0031-900700aTerahertz Response and Colossal Kerr Rotation from the Surface States of the Topological Insulator Bi2Se30 aTerahertz Response and Colossal Kerr Rotation from the Surface S cFeb a50 v1083 a
We report the THz response of thin films of the topological insulator Bi2Se3. At low frequencies, transport is essentially thickness independent showing the dominant contribution of the surface electrons. Despite their extended exposure to ambient conditions, these surfaces exhibit robust properties including narrow, almost thickness-independent Drude peaks, and an unprecedentedly large polarization rotation of linearly polarized light reflected in an applied magnetic field. This Kerr rotation can be as large as 65 degrees and can be explained by a cyclotron resonance effect of the surface states.
10abi2te310aPhysics1 aAguilar, R., V.1 aStier, A., V.1 aLiu, W.1 aBilbro, L., S.1 aGeorge, D., K.1 aBansal, N.1 aWu, L.1 aCerne, J.1 aMarkelz, A., G.1 aOh, S.1 aArmitage, N., P. uhttps://markelz.physics.buffalo.edu/node/22100927nas a2200169 4500008004500000020002200045245009300067210006900160260001900229520038000248100001800628700001500646700002000661700001400681700001300695856004900708 2011 Engldsh a978-1-4577-0509-000aMagneto Optical Polarization Measurements using THz Polarization Modulation Spectroscopy0 aMagneto Optical Polarization Measurements using THz Polarization aNew YorkbIeee3 aWe report a new broad band technique for rapidly measuring the complex Faraday and Kerr rotations in materials such as topological insulators and graphene, combining the distinct advantages of THz time domain spectroscopy and polarization modulation techniques. The performance of the system is demonstrated using GaAs two dimensional electron gas in a magnetic field.
1 aStier, A., V.1 aGeorge, D.1 aMarkelz, A., G.1 aCerne, J.1 aKoch, M. uhttps://markelz.physics.buffalo.edu/node/244