%0 Book Section %1 statphys23_0227 %A Selke, W. %A Holtschneider, M. %A Leidl, R. %A Wessel, S. %B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics %C Genova, Italy %D 2007 %E Pietronero, Luciano %E Loreto, Vittorio %E Zapperi, Stefano %K antiferromagnet biconical classical heisenberg lattice models montecarlo quantum simulations square statphys23 structures topic-2 %T Classical and quantum two-dimensional Heisenberg antiferromagnets %U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=227 %X The classical and the quantum, spin= 1/2, versions of the uniaxially anisotropic Heisenberg antiferromagnet on a square lattice in a field parallel to the easy axis are studied using Monte Carlo techniques (1,2). For the classical version, the role of biconical fluctuations at low temperatures in the transition region between the antiferromagnetic and spin-flop phases is elucidated. For the quantum version, the previously proposed scenario of a first-order transition between the antiferromagnetic and spin-flop phases with a critical endpoint and a tricritical point is scrutinized. (1) M. Holtschneider, W. Selke, and R. Leidl, Phys. Rev. B72, 064443 (2005) (2) M. Holtschneider, S. Wessel, and W. Selke, cond-mat 0703135

@incollection{statphys23_0227, abstract = {The classical and the quantum, spin= 1/2, versions of the uniaxially anisotropic Heisenberg antiferromagnet on a square lattice in a field parallel to the easy axis are studied using Monte Carlo techniques (1,2). For the classical version, the role of biconical fluctuations at low temperatures in the transition region between the antiferromagnetic and spin-flop phases is elucidated. For the quantum version, the previously proposed scenario of a first-order transition between the antiferromagnetic and spin-flop phases with a critical endpoint and a tricritical point is scrutinized. (1) M. Holtschneider, W. Selke, and R. Leidl, Phys. Rev. B72, 064443 (2005) (2) M. Holtschneider, S. Wessel, and W. Selke, cond-mat 0703135}, added-at = {2007-06-20T10:16:09.000+0200}, address = {Genova, Italy}, author = {Selke, W. and Holtschneider, M. and Leidl, R. and Wessel, S.}, biburl = {https://www.bibsonomy.org/bibtex/27a6214a34ab3318566512f1050c421b7/statphys23}, booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics}, editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano}, interhash = {74a9dfb33e5d95a85b248433ce860977}, intrahash = {7a6214a34ab3318566512f1050c421b7}, keywords = {antiferromagnet biconical classical heisenberg lattice models montecarlo quantum simulations square statphys23 structures topic-2}, month = {9-13 July}, timestamp = {2007-06-20T10:16:14.000+0200}, title = {Classical and quantum two-dimensional Heisenberg antiferromagnets}, url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=227}, year = 2007 }