Collective excitation of quantum wires and effect of spin-orbit coupling in the presence of a magnetic field along the wire

Details Collective excitation of quantum wires and effect of spin-orbit coupling in the presence of a magnetic field along the wire Collective excitation of quantum wires and effect of spin-orbit coupling in the presence of a magnetic field along the wire

2005-11-24

arxiv.org/abs/cond-mat/0511591v1

Physical Review B, Vol. 72, 245338 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX 4 file, 4pages, 6 eps figures. To appear in Physical Review B

Scientific paper

10.1103/PhysRevB.72.245338

The band structure of a quantum wire with the Rashba spin-orbit coupling develops a pseudogap in the presence of a magnetic field along the wire. In such a system spin mixing at the Fermi wavevectors $-k_F$ and $k_F$ can be different. We have investigated theoretically the collective mode of this system, and found that the velocity of this collective excitation depends sensitively on the strength of the Rashba spin-orbit interaction and magnetic field. Our result suggests that the strength of the spin-orbit interaction can be determined from the measurement of the velocity.

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