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HL: Fachverband Halbleiterphysik

HL 75: Transport: Spintronics and magnetotransport 1 (TT, jointly with HL, MA)

HL 75.6: Vortrag

Donnerstag, 14. März 2013, 10:45–11:00, H18

Rashba spin-orbit-interaction-based quantum pump in graphene — •Dario Bercioux¹, Daniel F. Urban^2,3, Francesco Romeo⁴, and Roberta Citro⁴ — ¹Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, 79104 Freiburg, Germany — ²Physikalisches Institut, Albert-Ludwigs-Universität, 79104 Freiburg, Germany — ³Fraunhofer Institute for Mechanics of Materials IWM, Wöhlerstraße 11, 79108 Freiburg, Germany — ⁴Dipartimento di Fisica “E. R. Caianiello” and Spin-CNR, Università degli Studi di Salerno, I-84084 Fisciano (Sa), Italy

We present a proposal for an adiabatic quantum pump based on a graphene monolayer patterned by electrostatic gates and operated in the low-energy Dirac regime [1]. The setup under investigation works in the presence of inhomogeneous spin-orbit interactions of intrinsic- and Rashba-type and allows to generate spin polarized coherent current. A local spin polarized current is induced by the pumping mechanism assisted by the spin-double refraction phenomenon [2].
[1] Citro, Appl. Phys. Lett. 101, 122445 (2012)
D. Bercioux, A. de Martino, Phys. Rev. B 83, 012106 (2011)