1.
Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling.
Phys Rev Lett
; 106(23): 236601, 2011 Jun 10.
Article
in English
| MEDLINE
| ID: mdl-21770530
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.