A NEW UNIVERSALITY CLASS FOR THE METAL-INSULATOR-TRANSITION PROBLEM

被引:7
作者
KIRKPATRICK, TR
BELITZ, D
机构
[1] UNIV OREGON,DEPT PHYS,EUGENE,OR 97403
[2] UNIV OREGON,INST MAT SCI,EUGENE,OR 97403
关键词
D O I
10.1088/0953-8984/4/1/009
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A new scenario is proposed for a class of disordered interacting electronic systems undergoing a metal-insulator transition. The scenario applies in the absence of spin-flip mechanisms to systems that are not nearly ferromagnetic. At the phase transition both the spin susceptibility and the coefficient of the linear tem in the specific heat diverge with identical exponents, and the electrical conductivity vanishes continuously with a different exponent. Approximate values am given for the critical exponents of transport and thermodynamic properties in three-dimensional systems.
引用
收藏
页码:L37 / L42
页数:6
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