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HL: Fachverband Halbleiterphysik

HL 52: Transport properties

HL 52.1: Vortrag

Freitag, 30. März 2007, 11:00–11:15, H14

Electronic spin precession and interferometry from spin-orbital entanglement in a double quantum dot — •Pascal SIMON¹ and Denis FEINBERG² — ¹Department of Physics, university of Basel (Switzerland) and LPMMC, University Joseph Fourier & CNRS, Grenoble (France) — ²laboratoire Louis Néel, CNRS & University Joseph Fourier, Grenoble (France)

A double quantum dot inserted in parallel between two metallic leads allows to entangle the electron spin with the orbital (dot index) degree of freedom. An Aharonov-Bohm orbital phase can then be transferred to the spinor wavefunction, providing a geometrical control of the spin precession around a fixed magnetic field. A fully coherent behaviour is obtained in a mixed orbital/spin Kondo regime. Evidence for the spin precession can be obtained, either using spin-polarized metallic leads or by placing the double dot in one branch of a metallic loop.