Anomalous spin-resolved point-contact transmission of holes due to cubic rashba spin-orbit coupling

Stefano Chesi, Gabriele F. Giuliani, L. P. Rokhinson, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Evidence is presented for the finite wave vector crossing of the two lowest one-dimensional spin-split subbands in quantum point contacts fabricated from two-dimensional hole gases with strong spin-orbit interaction. This phenomenon offers an elegant explanation for the anomalous sign of the spin polarization filtered by a point contact, as observed in magnetic focusing experiments. Anticrossing is introduced by a magnetic field parallel to the channel or an asymmetric potential transverse to it. Controlling the magnitude of the spin splitting affords a novel mechanism for inverting the sign of the spin polarization.

Original languageEnglish (US)
Article number236601
JournalPhysical review letters
Volume106
Issue number23
DOIs
StatePublished - Jun 10 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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