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The groundstates and phases of the two-dimensional fully frustrated XY model
Umeå University, Faculty of Science and Technology, Department of Physics. (Statistisk fysik)
Umeå University, Faculty of Science and Technology, Department of Physics. (Statistisk fysik)
2010 (English)In: CONDENSED MATTER THEORIES, VOL 24, 2010, 3-14 p.Conference paper, Published paper (Refereed)
Abstract [en]

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.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-109985DOI: 10.1142/9789814289153_0001ISI: 000278418300001OAI: oai:DiVA.org:umu-109985DiVA: diva2:860012
Conference
Conference: 32nd International Workshop on Condensed Matter Theories, Loughborough Univ, Loughborough, ENGLAND, AUG 12-19, 2008
Available from: 2015-10-09 Created: 2015-10-09 Last updated: 2015-10-09Bibliographically approved

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Minnhagen, PetterBernhardsson, Sebastian

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