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Critical Exponents in Isotropic Spin Systems

1972; American Physical Society; Volume: 6; Issue: 5 Linguagem: Inglês

10.1103/physrevb.6.1891

0556-2805

Franz Wegner,

Quantum and electron transport phenomena

Critical indices for isotropic systems of $n$-dimensional spins in ($d=4\ensuremath{-}\ensuremath{\epsilon}$)-dimensional lattices are calculated to order $\ensuremath{\epsilon}$. All critical indices corresponding to perturbations of the spin probability distribution are given. Such perturbations might arise from the effects of external or crystal fields on the spin system.