244 citations · 450 across the 8 of their papers we have counts for
Showing 2017Show all
2 papers · 1 filter
cond-mat.str-el2017★ 7 cited
Ground state degeneracy in quantum spin systems protected by crystal symmetries
Yang Qi, Chen Fang, Liang Fu
We develop a no-go theorem for two-dimensional bosonic systems with crystal symmetries: if there is a half-integer spin at a rotation center, where the point-group symmetry is $\ma…
cond-mat.supr-con2017★ 13 cited
Topological crystalline superconductors with linearly and projectively represented symmetry
Chen Fang, B. Andrei Bernevig, Matthew J. Gilbert
We study superconductors with -fold rotational invariance both in the presence and in the absence of spin-orbit interactions. More specifically, we classify the non-interacting…