Spin filter using semiconductor point contacts with spin-orbit interaction

Mikio Eto, T. Hayashi, Y. Kurotani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We theoretically study the ballistic transport through a quantum wire with a narrow constriction, "point contact," in the presence of Rashba spin-orbit (SO) interaction. By numerical studies, we find that the conductance is quantized in units of 2e2/h when the constriction changes gradually in space, and that the current is spin-polarized in the transverse direction. This is due to the transition between subbands of different spins during the transport through the point contact. The spin-polarization ratio is determined by the adiabaticity of the transition, which is evaluated by the Landau-Zener theory. The spin polarization of 60% can be realized with experimentally accessible values of the SO interaction strength.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages1516-1517
Number of pages2
Volume850
DOIs
Publication statusPublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Fingerprint

spin-orbit interactions
filters
constrictions
polarization
quantum wires
ballistics

Keywords

  • Conductancequantization
  • Point contact
  • Rashba
  • Spin-orbitinteraction
  • Spinfilter

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Eto, M., Hayashi, T., & Kurotani, Y. (2006). Spin filter using semiconductor point contacts with spin-orbit interaction. In AIP Conference Proceedings (Vol. 850, pp. 1516-1517) https://doi.org/10.1063/1.2355279

Spin filter using semiconductor point contacts with spin-orbit interaction. / Eto, Mikio; Hayashi, T.; Kurotani, Y.

AIP Conference Proceedings. Vol. 850 2006. p. 1516-1517.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Eto, M, Hayashi, T & Kurotani, Y 2006, Spin filter using semiconductor point contacts with spin-orbit interaction. in AIP Conference Proceedings. vol. 850, pp. 1516-1517, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 06/8/10. https://doi.org/10.1063/1.2355279
Eto M, Hayashi T, Kurotani Y. Spin filter using semiconductor point contacts with spin-orbit interaction. In AIP Conference Proceedings. Vol. 850. 2006. p. 1516-1517 https://doi.org/10.1063/1.2355279
Eto, Mikio ; Hayashi, T. ; Kurotani, Y. / Spin filter using semiconductor point contacts with spin-orbit interaction. AIP Conference Proceedings. Vol. 850 2006. pp. 1516-1517
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