Paper 13139-19
Dynamical formation and manipulation of persistent spin helices in two-dimensional electron gases (Invited Paper)
19 August 2024 • 8:50 AM - 9:15 AM PDT | Conv. Ctr. Room 11B
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.
Presenter
Technische Univ. Dortmund (Germany)
PhD: 2002 Technical University Munich
since 2009: professor of experimental physics at TU Dortmund university
Resaerch areas: ultrafast and nonlinear optics, carrier and spin dynmics in seminconductors