arXiv 1012.18452010-12-09cond-mat.str-elcond-mat.mes-hall

Spin reconstruction in quantum wires subject to a perpendicular magnetic field

Gilad Barak, Loren N. Pfeiffer, Ken W. West, Bertrand I. Halperin, Amir Yacoby

英文摘要：

We study the effects of a perpendicular magnetic field on the spin and charge distribution across a quantum wire. Using momentum resolved tunneling between two parallel wires we measure the dispersion relation for different perpendicular magnetic fields. We find that as the magnetic field increases, a strip of spin polarized electrons separates in the cross section of the wire. We provide a quantitative description of the emerging structure within a Hartree-Fock approximation, showing that it results from exchange interaction between electrons in the wire. We discuss the relation of these results to the structure of Quantum Hall edge states.

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