## Quantum Hall Valley NematicsAdd to your list(s) Download to your calendar using vCal - Sid Parameswaran (Oxford)
- Thursday 16 November 2017, 13:45-15:00
- Theory Library.
If you have a question about this talk, please contact Mike Gunn. The interplay between quantum Hall ordering and spontaneously broken ’’internal’’ symmetries in two-dimensional electron systems with spin or pseudospin degrees of freedom gives rise to a variety of interesting phenomena, including novel phases, phase transitions, and topological excitations. I will discuss a theory of broken-symmetry quantum Hall states, applicable to a class of multivalley systems, where the symmetry at issue is a point-group element that combines a spatial rotation with a permutation of valley indices. I will explore its ramifications for the phase diagram of a variety of experimental systems, such as AlAs and Si quantum wells and the surface states of bismuth. I will also discuss unconventional transport phenomena in these phases in the presence of quenched randomness, and the possible mechanisms of selection between degenerate broken-symmetry phases in clean systems. References: [1] D.A. Abanin, S.A. Parameswaran, S.A. Kivelson and S.L. Sondhi, Phys. Rev. B 82 , 035428 (2010). [2] A. Kumar, S.A. Parameswaran and S.L. Sondhi, Phys. Rev. B 88 , 045133 (2013). [3] A. Kumar, S.A. Parameswaran and S.L. Sondhi, Phys. Rev. B. 93, 014442 (2016). This talk is part of the Theoretical Physics Seminars series. ## This talk is included in these lists:Note that ex-directory lists are not shown. |
## Other listsEPS - College Research Teas Reading Group in Combinatorics and Probability IRLab Seminars: Robotics, Computer Vision & AI## Other talksTest talk Quantum simulations using ultra cold ytterbium Geometry of alternating projections in metric spaces with bounded curvature Modelling uncertainty in image analysis. Provably Convergent Plug-and-Play Quasi-Newton Methods for Imaging Inverse Problems Extending the Lax type operator for finite W-algebras |