Spin separation in cyclotron motion

Charged carriers with different spin states are spatially separated in a two-dimensional hole gas. Because of strong spin-orbit interaction, holes at the Fermi energy in GaAs have different momenta for two possible spin states traveling in the same direction, and, correspondingly, different cyclotro...

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Bibliographic Details
Published inPhysical review letters Vol. 93; no. 14; p. 146601
Main Authors Rokhinson, L P, Larkina, V, Lyanda-Geller, Y B, Pfeiffer, L N, West, K W
Format Journal Article
LanguageEnglish
Published United States 01.10.2004
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Summary:Charged carriers with different spin states are spatially separated in a two-dimensional hole gas. Because of strong spin-orbit interaction, holes at the Fermi energy in GaAs have different momenta for two possible spin states traveling in the same direction, and, correspondingly, different cyclotron orbits in a weak magnetic field. Two point contacts, acting as a monochromatic source of ballistic holes and a narrow detector arranged in the magnetic focusing geometry are demonstrated to work as a tunable spin filter.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.93.146601