Dynamical formation and manipulation of persistent spin helices in two-dimensional electron gases

Markus Betz

doi:10.1117/12.3027311

3 October 2024 Dynamical formation and manipulation of persistent spin helices in two-dimensional electron gases

Markus Betz

Proceedings Volume 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII; 131390I (2024) https://doi.org/10.1117/12.3027311
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

The spin-orbit interaction in two-dimensional electron gases is responsible for a broad range of phenomena, including spin Hall effects and spin textures such as the persistent spin helix (PSH). A PSH occurs when parameters associated with the bulk (Dresselhaus) and structural (Rashba) inversion asymmetries are roughly equal in strength. This situation results in a momentum-dependent effective magnetic field providing the SU(2) symmetry in which the two-dimensional electron gas (2DEG) features a unidirectional spin grating (or helical spin-density wave). Here I will focus on several new aspects of PSH formation and manipulation obtained from temporally and spatially resolved Kerr microscopy.

Conference Presentation

Citation Download Citation

Markus Betz "Dynamical formation and manipulation of persistent spin helices in two-dimensional electron gases", Proc. SPIE 13139, Ultrafast Nonlinear Imaging and Spectroscopy XII, 131390I (3 October 2024); https://doi.org/10.1117/12.3027311

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