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
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
收藏
页码:15271 / 15275
页数:5
相关论文
共 24 条
[1]  
ARTEMENKO SN, 1984, ZH EKSP TEOR FIZ, V60, P395
[2]   TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].
BLONDER, GE ;
TINKHAM, M ;
KLAPWIJK, TM .
PHYSICAL REVIEW B, 1982, 25 (07) :4515-4532
[3]   FAR-INFRARED PROPERTIES OF URU2SI2 [J].
BONN, DA ;
GARRETT, JD ;
TIMUSK, T .
PHYSICAL REVIEW LETTERS, 1988, 61 (11) :1305-1308
[4]   MAGNETIC EXCITATIONS IN THE HEAVY-FERMION SUPERCONDUCTOR URU2SI2 [J].
BROHOLM, C ;
LIN, H ;
MATTHEWS, PT ;
MASON, TE ;
BUYERS, WJL ;
COLLINS, MF ;
MENOVSKY, AA ;
MYDOSH, JA ;
KJEMS, JK .
PHYSICAL REVIEW B, 1991, 43 (16) :12809-12822
[5]   MAGNETIC EXCITATIONS AND ORDERING IN THE HEAVY-ELECTRON SUPERCONDUCTOR URU2SI2 [J].
BROHOLM, C ;
KJEMS, JK ;
BUYERS, WJL ;
MATTHEWS, P ;
PALSTRA, TTM ;
MENOVSKY, AA ;
MYDOSH, JA .
PHYSICAL REVIEW LETTERS, 1987, 58 (14) :1467-1470
[6]  
FULDE P, 1988, SOLID STATE PHYS, V41, P1
[7]   A SINGLE SUPERCONDUCTING TRANSITION IN URU2SI2 - COMPARISON WITH UPT3 [J].
HASSELBACH, K ;
LEJAY, P ;
FLOUQUET, J .
PHYSICS LETTERS A, 1991, 156 (06) :313-316
[8]   POINT-CONTACT MEASUREMENTS OF URU2SI2 [J].
HASSELBACH, K ;
KIRTLEY, JR ;
LEJAY, P .
PHYSICA B-CONDENSED MATTER, 1993, 186-88 :201-206
[9]   POINT-CONTACT SPECTROSCOPY OF SUPERCONDUCTING URU2SI2 [J].
HASSELBACH, K ;
KIRTLEY, JR ;
LEJAY, P .
PHYSICAL REVIEW B, 1992, 46 (09) :5826-5829
[10]   DENSITY OF STATES OF QUASI-ONE-DIMENSIONAL CHARGE-DENSITY AND SPIN-DENSITY WAVES [J].
HUANG, XZ ;
MAKI, K .
PHYSICAL REVIEW B, 1989, 40 (04) :2575-2577