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Updated: May 30, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling
Stefano Chesi1, Gabriele F Giuliani, L P Rokhinson
1Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA.
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.
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