Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2004-08-13
Phys. Rev. B 71, 153305 (2005)
Physics
Condensed Matter
Other Condensed Matter
5 pages, 2 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.71.153305
We present the analytical result of the expectation value of spin resulting from an injected spin polarized electron into a semi-infinitely extended 2DEG plane with [001] growth geometry via ideal quantum point contact. Both the Rashba and Dresselhaus spin-orbit couplings are taken into account. A pictorial interpretation of the spin precession along certain transport directions is given. The spin precession due to the Rashba term is found to be especially interesting since it behaves simply like a windshield wiper which is very different from the ordinary precession while that due to the Dresselhaus term is shown to be crystallographic-direction-dependent. Some crystallographic directions with interesting and handleable behavior of spin precession are found and may imply certain applicability in spintronic devices.
Chang Ching-Ray
Chen Son-Hsien
Liu Ming-Hao
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