The groundstates and phases of the two-dimensional fully frustrated XY model
2009 (English)In: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 23, no 20-21, 3939-3950 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Singapore: World Scientific , 2009. Vol. 23, no 20-21, 3939-3950 p.
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-32479DOI: 10.1142/S0217979209063171OAI: oai:DiVA.org:umu-32479DiVA: diva2:303389