NMR EVIDENCE FOR UNIVERSAL NONCLASSICAL CRITICAL-BEHAVIOR OF INCOMMENSURATELY MODULATED CRYSTALS

被引：29

作者：

HOLZER, KP ^{[1
]}

PETERSSON, J ^{[1
]}

SCHUSSLER, D ^{[1
]}

WALISCH, R ^{[1
]}

HACKER, U ^{[1
]}

MICHEL, D ^{[1
]}

机构：

[1] UNIV LEIPZIG,FACHBEREICH PHYS,D-04103 LEIPZIG,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.71.89

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nonclassical universal critical behavior is revealed in several one dimensionally modulated incommensurate (IC) crystals by means of quadrupolar perturbed NMR. In the IC phase the temperature dependence of the NMR line shape leads to the same critical order parameter exponent beta for all systems. Above the phase transition a nonclassical exponent was found for the critical contribution to the spin-lattice relaxation. All results agree with the theoretical predictions of the 3D XY model.

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页码：89 / 92

页数：4

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