Static critical behavior of the two-dimensional Ising spin glassRb2Cu1−xCoxF4
نویسندگان
چکیده
منابع مشابه
Critical thermodynamics of the two-dimensional +/-J Ising spin glass.
We compute the exact partition function of 2d Ising spin glasses with binary couplings. In these systems, the ground state is highly degenerate and is separated from the first excited state by a gap of size 4J. Nevertheless, we find that the low temperature specific heat density scales as exp(-2J/T), corresponding to an "effective" gap of size 2J; in addition, an associated crossover length sca...
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The equilibrium ensemble approach to disordered systems is used to investigate the critical behavior of the two-dimensional Ising model in the presence of quenched random site dilution. The numerical transfer matrix technique in semi-infinite strips of finite width, together with phenomenological renormalization and conformal invariance, is particularly suited to putting the equilibrium ensembl...
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We report computations of the short- and long-distance (scaling) contributions to the square-lattice Ising susceptibility. Both computations rely on summation of correlation functions, obtained using nonlinear partial difference equations. In terms of a temperature variable tau, linear in T/Tc-1, the short-distance terms have the form tau(p)(ln/tau/)q with p> or =q2. A high- and low-temperature...
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The form factor bootstrap approach is used to compute the exact contributions in the large distance expansion of the correlation function < σ(x)σ(0) > of the twodimensional Ising model in a magnetic field at T = Tc. The matrix elements of the magnetization operator σ(x) present a rich analytic structure induced by the (multi) scattering processes of the eight massive particles of the model. The...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1988
ISSN: 0163-1829
DOI: 10.1103/physrevb.38.8985