BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Topology\, symmetry\, and anomalies: investigating domain wall phy
 sics in quantum Hall nematic states - Associate Professor\, Rudolf Peierls
  Centre for Theoretical Physics\, University of Oxford 
DTSTART:20181130T143000Z
DTEND:20181130T153000Z
UID:TALK115207@talks.cam.ac.uk
CONTACT:Kayleigh Dunn
DESCRIPTION:I will present recent work on ferromagnetic quantum Hall state
 s that form on (111) surfaces of elemental Bismuth in high magnetic fields
 . This unusual states of matter combine the topological features of quantu
 m Hall states with orientational symmetry breaking characteristic of nemat
 ic order. Recent scanning tunneling microscopy measurements have directly 
 visualized the spontaneous formation of boundary modes between distinct ne
 matic domains and investigated their electronic structure [1]. I will demo
 nstrate that these boundary modes belong to a new class of `symmetry-prote
 cted’ Luttinger liquid that arise from the interplay of symmetry-breakin
 g with quantum Hall physics\, and that they provide a concrete realization
  of `anomaly inflow’ [2]. The analysis reveals strikingly different beha
 vior of domain wall transport at quantum Hall filling factor $\\nu=1\,2$\,
  in striking agreement with the STM results. I will explore implications o
 f these ideas for the global phase diagram of quantum Hall valley nematics
  [3].\n\n[1] M.T. Randeria\, K. Agarwal\, B. E. Feldman\, H. Ding \, Huiwe
 n Ji3 \, R. J. Cava \, S. L. Sondhi \, S. A. Parameswaran\, A. Yazdani\, u
 nder review. \n[2]K. Agarwal\, M.T. Randeria\, A. Yazdani\, S.L. Sondhi\, 
 S.A. Parameswaran\, arXiv:1807.10293. \n[3] S.A. Parameswaran and B.E. Fel
 dman\, arXiv:1809.09616.
LOCATION:Small Lecture Theatre\, Bragg Building\, Cavendish Laboratory (Ph
 ysics Department)
END:VEVENT
END:VCALENDAR