THE GROUNDSTATES AND PHASES OF THE TWO-DIMENSIONAL FULLY FRUSTRATED XY MODEL
2009 ◽
Vol 23
(20n21)
◽
pp. 3939-3950
Keyword(s):
Xy Model
◽
The 2D Fully Frustrated XY(FFXY) class of models is shown to contain a new groundstate in addition to the checkerboard groundstate of the standard 2D XY model. The spin configuration of this additional groundstate is obtained and its connection to a broken Z2-symmetry explained. This means that the class of 2D FFXY models belongs within a U(1) ⊗ Z2 ⊗ Z2-symmetry phase-transition representation. The phase diagram is reviewed and the central charges of the four multicritical points described. The implications for the standard 2D FFXY-model are discussed and elucidated, in particular with respect to the long standing controversy concerning the phase transitions of the standard 2D FFXY-model.
Keyword(s):
2001 ◽
Vol 16
(17)
◽
pp. 1129-1138
◽
1996 ◽
Vol 223
(4)
◽
pp. 261-266
◽
2004 ◽
Vol 15
(08)
◽
pp. 1095-1103
◽
2021 ◽
2020 ◽