Flux tubes, visons, and vortices in spin-charge separated superconductors
arXiv:cond-mat/0010436 · doi:10.1016/S0921-4534(01)00193-9
Abstract
The idea of spin-charge separation in cuprate superconductors has been recently energized by Senthil and Fisher who formulated a Z_2 gauge theory and, within its context, proposed a ``vison detection'' experiment as a test for topological order in a sample with multiply connected geometry. Here we show that the same experiment can be performed to test for the spin-charge separation in U(1) [but not in SU(2)] theory and argue that vortex core spectroscopy can in fact distinguish between the different symmetries of the fictitious gauge field.
3 pages, 1 ps figure. Invited talk at the 13th International Symposium on Superconductivity in Tokyo