TUNING OF NON-FERMI-LIQUID BEHAVIOR WITH PRESSURE

被引：123

作者：

BOGENBERGER, B

VONLOHNEYSEN, H

机构：

[1] Physikalisches Institut, Universität Karlsruhe

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.74.1016

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Néel temperature of the antiferromagnetic heavy-fermion alloy CeCu5.7Au0.3 (TN=0.49 K for p=0) can be continuously tuned to zero with increasing hydrostatic pressure p. At p=pc where TN=0 is reached, the specific heat C varies as CT∼-ln(TT0) between 0.1 and 2 K, indicative of non-Fermi-liquid behavior. The observed linear TN(p) dependence puts rigorous constraints on theories for a quantum phase transition at T=0 between magnetic and nonmagnetic ground states. © 1995 The American Physical Society.

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页码：1016 / 1019

页数：4

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