University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, February 27th 2015
12:00 pm:
Condensed Matter Seminar in in Physics 435
Speaker: Paula Melado, School of Engineering and Applied Sciences, Adolfo Ibanez University, Santiago, Chile

Low-energy states of quantum spin liquids are thought to involve partons
living in a gauge-field background. We study the spectrum of Majorana
fermions of Kitaev's honeycomb model on spherical clusters. The gauge field
endows the partons with half-integer orbital angular momenta. As a consequence, the
multiplicities reflect not the point-group symmetries of the cluster, but
rather its projective symmetries, operations combining physical and gauge
transformations. The projective symmetry group of the ground state is the
double cover of the point group [1].

[1] Phys. Rev. B 91, 041103(R) (2015).

Faculty Host: Andrey Chubukov

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