Thermoelectric transport signatures of Dirac composite fermions in the half-filled Landau level

  title={Thermoelectric transport signatures of Dirac composite fermions in the half-filled Landau level},
  author={Andrew C. Potter and Maksym Serbyn and Ashvin Vishwanath},
  journal={arXiv: Strongly Correlated Electrons},
The half filled Landau level is expected to be approximately particle-hole symmetric, which requires an extension of the Halperin-Lee-Read (HLR) theory of the compressible state observed at this filling. Recent work indicates that, when particle-hole symmetry is preserved, the composite Fermions experience a quantized $\pi$-Berry phase upon winding around the composite Fermi-surface, analogous to Dirac fermions at the surface of a 3D topological insulator. In contrast, the effective low energy… 

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