EFFECT OF RANDOM QUENCHED IMPURITIES ON THE CRITICAL-BEHAVIOR OF A 4-STATE POTTS SYSTEM IN 2 DIMENSIONS - AN EXPERIMENTAL-STUDY

被引：47

作者：

SCHWENGER, L

BUDDE, K

VOGES, C

PFNUR, H

机构：

[1] Institut für Festkörperphysik, Universität Hannover, D-30167 Hannover

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.73.296

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Critical behavior of the order-disorder phase transition of the (2 x 2)-2H structure on Ni(111) was investigated for the pure system and in the presence of 0.3%-3% of a monolayer of preadsorbed atomic oxygen. Depending on oxygen concentration, the values of the critical exponents beta, gamma, and nu change from those of the four-state Potts universality class to Ising-like exponents close to T(c), a behavior qualitatively in agreement with the effect of random quenched impurities.

引用

页码：296 / 299

页数：4

共 30 条

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