Abstract
Semiconductor holes with strong spin-orbit coupling allow all-electrical spin control, with broad applications ranging from spintronics to quantum computation. Using a two-dimensional hole system in a gallium arsenide quantum well, we demonstrate a new mechanism of electrically controlling the Zeeman splitting, which is achieved through altering the hole wave vector . We find a threefold enhancement of the in-plane -factor . We introduce a new method for quantifying the Zeeman splitting from magnetoresistance measurements, since the conventional tilted field approach fails for two-dimensional systems with strong spin-orbit coupling. Finally, we show that the Rashba spin-orbit interaction suppresses the in-plane Zeeman interaction at low magnetic fields. The ability to control the Zeeman splitting with electric fields opens up new possibilities for future quantum spin-based devices, manipulating non-Abelian geometric phases, and realizing Majorana systems in -type superconductor systems.
- Received 28 March 2018
- Corrected 17 August 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.077701
© 2018 American Physical Society
Physics Subject Headings (PhySH)
Corrections
17 August 2018
Correction: The list of author names has been reordered.
Synopsis
Widening the Spin Energy Gap
Published 15 August 2018
Using a new all-electric technique, researchers triple the energy gap between the two spin states of holes in a 2D quantum well.
See more in Physics