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http://dx.doi.org/10.4283/JMAG.2010.15.1.007

Suppression of Spin Dephasing in a Two-Dimensional Electron Gas with a Quantum Point Contact  

Jeong, Jae-Seung (Department of Physics and PCTP, Pohang University of Science and Technology)
Lee, Hyun-Woo (Department of Physics and PCTP, Pohang University of Science and Technology)
Publication Information
Journal of Magnetics / v.15, no.1, 2010 , pp. 7-11 More about this Journal
Abstract
Spin-orbit coupling (SOC) is a source of strong spin dephasing in two- and three-dimensional semiconducting systems. We report that spin dephasing in a two-dimensional electron gas can be suppressed by introducing a quantum point contact. Surprisingly, this suppression was not limited to the vicinity of the contact but extended to the entire two-dimensional electron gas. This facilitates the electrical control of the spin degree of freedom in a two-dimensional electron gas through spin-orbit coupling.
Keywords
spin-orbit coupling; quantum point contact; spin dephasing;
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