Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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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)
  • Published : 2010.03.31
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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.

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References

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