2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Symmetry protected Luttinger liquids on the surface of Quantum Hall Nematics.

6 Jun 2019, 11:45
SCP 8445.2 (Simon Fraser University)

SCP 8445.2

Simon Fraser University

Invited Speaker / Conférencier(ère) invité(e) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) R1-3 Condensed Matter Theory II (DCMMP) | Théorie de la matière condensée II (DPMCM)


Kartiek Agarwal (McGill University)


Quantum Hall Ferromagnets are a unique platform to study the confluence of symmetry-broken order parameter and topological physics. Recent experiments by Feldman et al.[1] observe clear signatures of valley-polarized Quantum Hall Ferromagnets on the surface of Bi(111) in the presence of strong magnetic fields. The tunneling conductance shows a discrete spectrum indicating the formation of Landau levels while individual nematic Landau level orbits pinned to impurities indicate selective occupation of certain valleys. Further recent experiments[2] observe domain wall states between such nematic domains. Curiously, these domain walls appear to host low energy excitations that appear to be gapped/gapless depending on the filling fraction of the nematic quantum Hall states. We explain[3] these observations both qualitatively and quantitatively by highlighting the role of interactions and symmetries in engendering such exotic Luttinger liquids.

[1] B. Feldman et al., Science 2016
[2] M. T. Randeria, KA et al., Nature 2019
[3] KA et al., ArXiv:1807.10293

Primary author

Kartiek Agarwal (McGill University)

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