TEMPERATURE-DEPENDENCE OF THE ANTIFERROMAGNETIC STATE IN URU2SI2 BY POINT-CONTACT SPECTROSCOPY

被引：52

作者：

ESCUDERO, R ^{[1
]}

MORALES, F ^{[1
]}

LEJAY, P ^{[1
]}

机构：

[1] CNRS, CTR RECH TRES BASSES TEMP, F-38042 GRENOBLE, FRANCE

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.49.15271

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Point-contact spectroscopy has been used to study the temperature evolution of the spin-density-wave (SDW) behavior of a URu2Si2 single crystal. In the c direction at a temperature of 19 K, we observe the onset of an asymmetric structure in the dV/dI versus V characteristic, and this has been correlated with the development of a SDW gap. We observe that the data follow a BCS behavior. In addition, we have performed tunneling experiments that indicate that only portions of the Fermi surface are being gapped. From these data we have measured the energy gap, 2DELTA = 11.7 meV, and the ratio 2DELTA/K(B)T(N) which gives a value of the order of 7.2.

引用

页码：15271 / 15275

页数：5

共 24 条

[21] MAGNETIC-PROPERTIES OF HEAVY-FERMION SUPERCONDUCTORS [J].

RAUCHSCHWALBE, U .

PHYSICA B & C, 1987, 147 (01) :1-80

[22] THERMODYNAMIC PROPERTIES OF CHARGE-DENSITY WAVES [J].

ROSHEN, WA .

PHYSICAL REVIEW B, 1985, 31 (11) :7296-7305

[23] EVIDENCE OF A MAGNETIC GAPLIKE EXCITATION IN URU2SI2 [J].

WALTER, U ;

LOONG, CK ;

LOEWENHAUPT, M ;

SCHLABITZ, W .

PHYSICAL REVIEW B, 1986, 33 (11) :7875-7878

[24] SIZE EFFECT AND NON-LOCAL BOLTZMANN TRANSPORT EQUATION IN ORIFICE AND DISK GEOMETRY [J].

WEXLER, G .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1966, 89 (566P) :927-+

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