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Phys. Rev. B 62, 14837–14843 (2000)

Extension to order β23 of the high-temperature expansions for the spin-1/2 Ising model on simple cubic and body-centered cubic lattices

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P. Butera* and M. Comi
Istituto Nazionale di Fisica Nucleare, Dipartimento di Fisica, Università di Milano, Via Celoria 16, 20133 Milano, Italy

Received 5 June 2000; published in the issue dated 1 December 2000

Using a renormalized linked-cluster-expansion method, we have extended to order β23 the high-temperature series for the susceptibility χ and the second-moment correlation length ξ of the spin-1/2 Ising models on the sc and the bcc lattices. A study of these expansions yields updated direct estimates of universal parameters, such as exponents and amplitude ratios, which characterize the critical behavior of χ and ξ. Our best estimates for the inverse critical temperatures are βcsc=0.221654(1) and βcbcc=0.1573725(6). For the susceptibility exponent we get γ=1.2375(6) and for the correlation length exponent ν=0.6302(4). The ratio of the critical amplitudes of χ above and below the critical temperature is estimated to be C+/C-=4.762(8). The analogous ratio for ξ is estimated to be f+/f-=1.963(8). For the correction-to-scaling amplitude ratio we obtain aξ+/aχ+=0.87(6).

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.14837
DOI:
10.1103/PhysRevB.62.14837
PACS:
75.10.Hk, 05.50.+q, 11.15.Ha, 64.60.Cn

*Electronic address: butera@mi.infn.it

Electronic address: comi@mi.infn.it