Superconductivity and pressure-induced electronic topological changes in CeCu2Si2

被引：29

作者：

Thomas, F

Ayache, C

Fomine, IA

Thomasson, J

Geibel, C

机构：

[1] TECH UNIV, INST FESTKORPERFORSCH, W-6100 DARMSTADT, GERMANY

[2] LD LANDAU THEORET PHYS INST, MOSCOW 117940, RUSSIA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 04期

关键词：

D O I：

10.1088/0953-8984/8/4/002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Refined measurements are reported on the pressure dependence of the superconducting transition temperature in the heavy-fermion (HF) superconductor CeCu2Si2. Two characteristic pressures, p(1) approximate to 3 GPa and p(2) approximate to 7.6 GPa, delimit three ranges of the superconducting state. The present study confirms the unique behaviour of CeCu2Si2 in the series of HF superconductors. This particular behaviour is interpreted as resulting from two contributions: a smooth one due to the pressure-increased Kondo temperature and sharper additional features reflecting topological changes in the renormalized heavy bands.

引用

页码：L51 / L57

页数：7

共 38 条

[1]

ALIEV FG, 1982, JETP LETT+, V35, P539

[2] HIGH-PRESSURE VALENCE INSTABILITY AND TC MAXIMUM IN SUPERCONDUCTING CECU2SI2 [J].

BELLARBI, B ;

BENOIT, A ;

JACCARD, D ;

MIGNOT, JM ;

BRAUN, HF .

PHYSICAL REVIEW B, 1984, 30 (03) :1182-1187

[3] CALORIMETRIC INVESTIGATION UNDER HIGH-PRESSURE OF THE HEAVY FERMION SUPERCONDUCTOR CECU2SI2 [J].

BLECKWEDEL, A ;

EICHLER, A .

SOLID STATE COMMUNICATIONS, 1985, 56 (08) :693-696

[4] PRESSURE-DEPENDENCE OF SPIN-FLUCTUATION EFFECTS IN THE SPECIFIC-HEAT OF THE HEAVY-FERMION SUPERCONDUCTOR UPT3 [J].

BRODALE, GE ;

FISHER, RA ;

PHILLIPS, NE ;

STEWART, GR ;

GIORGI, AL .

PHYSICAL REVIEW LETTERS, 1986, 57 (02) :234-237

[5] UNUSUAL B-T PHASE-DIAGRAM OF THE HEAVY-FERMION SUPERCONDUCTOR CECU2SI2 [J].

BRULS, G ;

WOLF, B ;

FINSTERBUSCH, D ;

THALMEIER, P ;

KOUROUDIS, I ;

SUN, W ;

ASSMUS, W ;

LUTHI, B ;

LANG, M ;

GLOOS, K ;

STEGLICH, F ;

MODLER, R .

PHYSICAL REVIEW LETTERS, 1994, 72 (11) :1754-1757

[6]

CHEN JW, 1984, P LT17, V1, P325

[7]

CHU CW, COMMUNICATION

[8] MAGNETISM AND SUPERCONDUCTIVITY IN HEAVY FERMION SYSTEMS [J].

FLOUQUET, J ;

BRISON, JP ;

HASSELBACH, K ;

TAILLEFER, L ;

BEHNIA, K ;

JACCARD, D ;

DEVISSER, A .

PHYSICA C, 1991, 185 :372-378

[9] A NEW HEAVY-FERMION SUPERCONDUCTOR - UNI2AL3 [J].

GEIBEL, C ;

THIES, S ;

KACZOROWSKI, D ;

MEHNER, A ;

GRAUEL, A ;

SEIDEL, B ;

AHLHEIM, U ;

HELFRICH, R ;

PETERSEN, K ;

BREDL, CD ;

STEGLICH, F .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1991, 83 (03) :305-306

[10] HEAVY-FERMION SUPERCONDUCTIVITY AT TC=2K IN THE ANTIFERROMAGNET UPD2AL3 [J].

GEIBEL, C ;

SCHANK, C ;

THIES, S ;

KITAZAWA, H ;

BREDL, CD ;

BOHM, A ;

RAU, M ;

GRAUEL, A ;

CASPARY, R ;

HELFRICH, R ;

AHLHEIM, U ;

WEBER, G ;

STEGLICH, F .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1991, 84 (01) :1-2

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