Interplay of quantum and thermal fluctuations in a frustrated magnet
2003 (English)In: Physical Review B, ISSN 1098-0121, Vol. 68, no 10, 104409- p.Article in journal (Refereed) Published
We demonstrate the presence of an extended critical phase in the transverse field Ising magnet on the triangular lattice, in a regime where both thermal and quantum fluctuations are important. We map out a complete phase diagram by means of quantum Monte Carlo simulations, and find that the critical phase is the result of thermal fluctuations destabilising an order established by the quantum fluctuations. It is separated by two Kosterlitz-Thouless transitions from the paramagnet on one hand and the quantum-fluctuation driven three-sublattice ordered phase on the other. Our work provides further evidence that the zero temperature quantum phase transition is in the three-dimensional XY universality class.
Place, publisher, year, edition, pages
American Physical Society , 2003. Vol. 68, no 10, 104409- p.
Research subject Physics Of Matter
IdentifiersURN: urn:nbn:se:su:diva-23203DOI: 10.1103/PhysRevB.68.104409OAI: oai:DiVA.org:su-23203DiVA: diva2:190640
Part of urn:nbn:se:su:diva-1842004-05-132004-05-132010-01-04Bibliographically approved