Crossover Phase Diagram of 2D Heisenberg Ferro- and Antiferromagnets

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We propose a single crossover phase diagram applicable to 2D collinear Heisenberg antiferromagnets (AFMs) and ferromagnets (FMs), and show that the scaling regimes of AFMs and FMs are in one-to-one correspondence. The phase diagram is split into classical and quantum regions. Our two key results are: (i) in the classical region, the AFMs and FMs exhibit nearly identical behavior near their respective ordering wavevectors, which we observe for S=1 and higher using series expansions; and (ii) in the quantum region, quantum critical (QC) regime is present not only for the AFMs, but for FMs as well.
5 pages, REVTeX v3 with 2 .ps figures, appended as uuencoded Z-compressed .tar file

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/147515

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9505148
 http://arxiv.org/abs/cond-mat/9505148

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arXiv