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HL: Fachverband Halbleiterphysik
HL 35: Poster I
HL 35.2: Poster
Tuesday, March 8, 2016, 15:00–19:00, Poster A
Spin Hall conductivity in topological insulators — •Francisco Mireles1 and John Schliemann2 — 1Departamento de Física Teórica, Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, BC, 22800, México. — 2Institut für Theoretische Physik, Universität Regensburg, D-93049 Regensburg, Germany.
Since the discovery of topological insulators in which topological states of matter are protected by time-reversal symmetry, there has been a great deal of interest in the physics of these materials. It is known that they can support helical two-dimensional states at its edges. An important feature is the hexagonal warping of the Hamiltonian of the charge carriers describing these systems. As a result, fundamentally different behavior is expected to appear in the spin and carrier transport in these systems. In particular, the physics of the spin transport and optical spin conductivities in topological insulators is still to be understood. In this work special attention is given to the study of spin-transport properties in such topological insulators. We study the Hall and optical Hall spin-conductivities within the Kubo formalism in linear response. We also present some useful analytical expressions describing the spin-currents in such topological massive Dirac Fermions systems.
* This work was supported by project ‘Spin Phenomena in Reduced Dimensions’ SFB 689, and DIONICOS project: 612707- FP7-PEOPLE-2013-IRSES.