Li, Yongqing

Tuesday June 25, 2013
Time: 11:00
Place: ETH Science City, HPF G6
Host:  Werner Dietsche/Werner Wegscheider

Spin Physics in the Lowest Landau Level

Yongqing Li
Institute of Physics, Chinese Academy of Sciences, Beijing, China

The interplay between electron-electron interactions and the Zeeman energy gives rise to rich spin physics in two-dimensional electron systems subject to high magnetic fields. In this talk we will focus on two cases related to the lowest Landau level. One is the half-filling, at which the transport properties near the spin transition from partially polarization to full polarization will be discussed. The other is the filling factor near one, where skyrmion physics is supposed to play an important role. We report results of nuclear spin relaxation measurements down to temperatures near 10 mK. The observed huge enhancement of nuclear spin relaxation is attributed to the electron inhomogeneity, which is often relevant to the physics at the half filling.