The groundstates and phases of the two-dimensional fully frustrated XY model
2010 (English)In: CONDENSED MATTER THEORIES, VOL 24, 2010, 3-14 p.Conference paper (Refereed)
The 2D Fully Frustrated NY(FFXY) class of models is shown to contain a new ground-state in addition to the checkerboard groundstate of the standard 2D NY model. The spin configuration of this additional groundstate is obtained and its connection to a broken Z(2)-symmetry explained. This means that the class of 2D FEXY models belongs within a U(1) circle times Z(2) circle times Z(2)-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 FEXY-model.
Place, publisher, year, edition, pages
2010. 3-14 p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-109985DOI: 10.1142/9789814289153_0001ISI: 000278418300001OAI: oai:DiVA.org:umu-109985DiVA: diva2:860012
Conference: 32nd International Workshop on Condensed Matter Theories, Loughborough Univ, Loughborough, ENGLAND, AUG 12-19, 2008