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

Autor:	Chesi, Stefano, Giuliani, Gabriele F., Rokhinson, L. P., Pfeiffer, L. N., West, K. W.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. Lett. 106, 236601 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.106.236601
Popis:	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. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1011.2676 Zobrazit plný text záznamu View this record from Arxiv