Magnetotransport in a two-dimensional electron gas in the presence of spin-orbit interaction

Details Magnetotransport in a two-dimensional electron gas in the presence of spin-orbit interaction Magnetotransport in a two-dimensional electron gas in the presence of spin-orbit interaction

2003-01-24

arxiv.org/abs/cond-mat/0301498v1

P.R.B 67, 085313 (2003).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Phys. Rev. B (in press)

Scientific paper

10.1103/PhysRevB.67.085313

We evaluate the transport coefficients of a two-dimensional electron gas (2DEG) in the presence of a perpendicular magnetic field and of the spin-orbit interaction (SOI) described only by the Rashba term. The SOI mixes the spin-up and spin-down states of neighboring Landau levels into two new, unequally spaced energy branches. The broadened density of states, as a function of the energy, and the longitudinal resistivity, as a function of the magnetic field, show beating patterns in agreement with observations. The positions of any two successive nodes in the beating pattern approximately determine the strength of the Rashba term. A strong SOI results in a splitting of the magnetoresistance peaks and a doubling of the number of the Hall plateaus. The peak value in derivative of the Hall resistivity reflects the strength of the SOI.

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