NCMN Seminar & Dept of Physics & Astronomy Colloquium
Collective spin excitations in chiral two-dimensional electron systems
4:00 pm –
5:00 pm
Jorgensen Hall Room: Jorgensen Hall Room 136
Contact:
Physics Department, 472-2770, paoffice@unl.edu
Speaker: Carsten Ullrich, University of Missouri-Columbia
ABSTRACT: Over the past four decades, itinerant electrons confined in two dimensions have given rise to the discovery of many new quantum effects.
This talk will give an overview of recent theoretical and experimental studies of collective spin excitations in chiral 2D electron systems, which can be realized in n-doped semiconductor quantum wells with Rashba and Dresselhaus spin-orbit coupling.
The interplay between Coulomb many-body effects and spin-orbit coupling is found to provide new ways of controlling the group
velocity of the electronic spin waves. A new exact result for interacting 2D electrons, the spin-helix Larmor theorem, is obtained.
Dr. Carson Ullrich received his M.S. in Physics at State University of New York at Albany in 1990 and Ph.D. in Physics at the University of Wurzburg in Germany in 1995. He has been a Professor of Physics at the University of Missouri-Columbia since 2013.
ABSTRACT: Over the past four decades, itinerant electrons confined in two dimensions have given rise to the discovery of many new quantum effects.
This talk will give an overview of recent theoretical and experimental studies of collective spin excitations in chiral 2D electron systems, which can be realized in n-doped semiconductor quantum wells with Rashba and Dresselhaus spin-orbit coupling.
The interplay between Coulomb many-body effects and spin-orbit coupling is found to provide new ways of controlling the group
velocity of the electronic spin waves. A new exact result for interacting 2D electrons, the spin-helix Larmor theorem, is obtained.
Dr. Carson Ullrich received his M.S. in Physics at State University of New York at Albany in 1990 and Ph.D. in Physics at the University of Wurzburg in Germany in 1995. He has been a Professor of Physics at the University of Missouri-Columbia since 2013.