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- W2043268710 abstract "Abstract The energies and the entropies of the spin-glass state and the paramagnetic state at T = 0 of the random-bond Ising mixture of the ferromagnetic bond (concentration p) and the antiferromagnetic bond (concentration 1 − p) on the square lattice are calculated by the method of the square approximation in the simple version. A self-consistent relation that the partial trace of the normalized density matrix of the square cluster is equal to that of the vertex ( tr ( jkl ϱ (4) (i,j,k,l) = ϱ (1) (i) ) leads to an integral equation for the distribution function of the effective fields, and it is solved exactly at T = 0. The symmetric solution of the integral equation contains the paramagnetic state and two spin-glass states, SG1 and SG2. The energies and the entropies of these states are obtained as functions of the concentration p. The values of the energies per spin at p = 1 2 are -0.75|EF|, -0.72746|EF|, -0.72543|EF|, and correspond to a minimum, a saddle point, and a maximum, respectively, and the values of the entropies are 0, 0.082886kB, and 0.054457kB, respectively. The present results are compared with those of the pair approximation and discussed." @default.
- W2043268710 created "2016-06-24" @default.
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- W2043268710 date "1980-12-01" @default.
- W2043268710 modified "2023-09-27" @default.
- W2043268710 title "Effect of the frustration to the ground state energy and entropy of the spin-glass in the random bond Ising model on the square lattice" @default.
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- W2043268710 doi "https://doi.org/10.1016/0378-4371(80)90003-5" @default.
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