Suppression of Spin Dephasing in a Two-Dimensional Electron Gas with a Quantum Point Contact
Abstract
Spin-orbit coupling 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.
- Publication:
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arXiv e-prints
- Pub Date:
- April 2010
- DOI:
- 10.48550/arXiv.1004.1006
- arXiv:
- arXiv:1004.1006
- Bibcode:
- 2010arXiv1004.1006J
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 9 pages, 4 figures