Stability of Chern and Fractional Chern insulators

Orateur : Alfonso GRUSHIN (Max-Planck Institute for Complex Systems)

Chern and fractional Chern insulators are topological phases that realize respectively analogues of the integer and fractional quantum Hall effects without the need of high external magnetic fields, making them highly promising for applications. In this talk I will review our current understanding of these phases and the challenges we confront today regarding their emergence. In particular I will focus on the important theoretical problem of when and how they are induced by short range electron-electron interactions, an issue relevant for both cold-atomic and condensed matter experiments, and end with a discussion of future avenues of research including out of equilibrium dynamics. Références :
arXiv:1407.6985
Phys. Rev. B 88, 245123 (2013)
Phys. Rev. B 87, 085136 (2013)

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