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Author Kalz, A. ♦ Honecker, A. ♦ Fuchs, S. ♦ Pruschke, T.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-09-15
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Statistical Mechanics ♦ Condensed Matter - Strongly Correlated Electrons ♦ physics:cond-mat
Abstract We use improved Monte-Carlo algorithms to study the antiferromagnetic 2D-Ising model with competing interactions $J_1$ on nearest neighbour and $J_2$ on next-nearest neighbour bonds. The finite-temperature phase diagram is divided by a critical point at $J_2 = J_1/2$ where the groundstate is highly degenerate. To analyse the phase boundaries we look at the specific heat and the energy distribution for various ratios of $J_2/J_1$. We find a first order transition for small $J_2 > J_1/2$ and the transition temperature suppressed to $T_C=0$ at the critical point.
Description Comment: 4 pages, 4 figures, accepted for publication in the proceedings of the conference on Highly Frustrated Magnets 2008 in Braunschweig
Reference: J. Phys.: Conf. Ser. 145 (2009) 012051
Educational Use Research
Learning Resource Type Article
Page Count 4


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