We derive compact analytical expressions for the coupled spin-charge susceptibility of a clean helical metal at the surface of a three-dimensional topological insulator (TI). These expressions lead to unconventional noncollinear Ruderman-Kittel-Kasuya-Yoshida interactions between two impurity magnetic moments placed on the surface of a TI and predict the generation of electric currents by time-dependent magnetic moments. We determine the influence of gate and bias voltages on the interlayer exchange coupling between two singledomain ferromagnetic monolayers deposited on top of a TI.
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Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
Univ Cambridge, Trinity Coll, Cambridge CB2 1TQ, EnglandUniv Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
Halasz, Gabor B.
Balents, Leon
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Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
机构:
Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, DresdenMax Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden
Flores-Calderon R.
Moessner R.
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Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, DresdenMax Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden
Moessner R.
Cook A.M.
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Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, DresdenMax Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden