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Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets | | C. Yasuda
; S. Todo
; K. Hukushima
; F. Alet
; M. Keller
; M. Troyer
; H. Takayama
; | | Date: |
16 Dec 2003 | | Journal: | Phys. Rev. Lett. 94, 217201 (2005) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | The Néel temperature, $T_{
m N}$, of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a function of inter-chain (inter-layer) to intra-chain (intra-layer) coupling $J’/J$ down to $J’/Jsimeq 10^{-3}$. We find that $T_{
m N}$ obeys a modified random-phase approximation-like relation for small $J’/J$ with an effective universal renormalized coordination number, independent of the size of the spin. Empirical formulae describing $T_{
m N}$ for a wide range of $J’$ and useful for the analysis of experimental measurements are presented. | | Source: | arXiv, cond-mat/0312392 | | Other source: | [GID 845880] pmid16090341 | | Services: | Forum | Review | PDF | Favorites | |
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