NEW CRITICAL-POINT EXPONENT AND NEW SCALING LAWS FOR SHORT-RANGE ISING SPIN-GLASSES

被引:77
|
作者
NIFLE, M
HILHORST, HJ
机构
[1] Laboratoire de Physique Théorique et Hautes Energies, Université de Paris-Sud, Bĝtiment 211
关键词
D O I
10.1103/PhysRevLett.68.2992
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We investigate the chaotic temperature dependence of the renormalized couplings in a short-range Ising spin glass. Some of our analytic and numerical results, obtained by the Migdal-Kadanoff renormalization scheme but argued to have general validity, differ from those of the scaling and droplet theory. First, chaos is present also at and above the critical temperature. Second, between d(l) = 2.46 (the lower critical dimension) and d+ = 3.4, the chaos in the critical region is characterized by a new critical exponent zeta(c) that has hitherto escaped attention.
引用
收藏
页码:2992 / 2995
页数:4
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