Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-08-12
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Accepted for publication in Semiconductors Science and Technology
Scientific paper
10.1088/0268-1242/20/11/001
The coupling between Zeeman spin splitting and Rashba spin-orbit terms has been studied experimentally in a gated InGaAs/InP quantum well structure by means of simultaneous measurements of the weak antilocalization (WAL) effect and beating in the SdH oscillations. The strength of the Zeeman splitting was regulated by tilting the magnetic field with the spin-zeros in the SdH oscillations, which are not always present, being enhanced by the tilt. In tilted fields the spin-orbit and Zeeman splittings are not additive, and a simple expression is given for the energy levels. The Rashba parameter and the electron g-factor were extracted from the position of the spin zeros in tilted fields. A good agreement is obtained for the spin-orbit coupling strength from the spin-zeros and weak antilocalization measurements.
Coleridge P. T.
Poole Philip J.
Studenikin Sergei A.
Yu Guiha
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