TUNNELING EVIDENCE FOR THE QUASI-PARTICLE GAP IN KONDO SEMICONDUCTORS CENISN AND CERHSB

被引：112

作者：

EKINO, T ^{[1
]}

TAKABATAKE, T ^{[1
]}

TANAKA, H ^{[1
]}

FUJII, H ^{[1
]}

机构：

[1] HIROSHIMA UNIV,FAC INTEGRATED ARTS & SCI,HIGASHIHIROSHIMA 739,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.75.4262

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Kondo semiconductors CeNiSn and CeRhSb were investigated by tunneling spectroscopy using a break junction. The differential conductances at 2-4 K show energy gaps of 8-10 and 20-27 meV for CeNiSn and CeRhSb, respectively, which are comparable to the Kondo temperatures. The tunneling spectra give clear evidence for a strong gap anisotropy. With increasing temperature, the zero-bias conductance displays a crossover from a well-developed gap state to a partial-gap state, and to a Kondo-metallic state.

引用

页码：4262 / 4265

页数：4

共 23 条

[1]

Aeppli G., 1992, COMMENTS COND MAT PH, V16, P155

[2] KONDO COUPLING INDUCED CHARGE GAP IN CE3BI4PT3 [J].

BUCHER, B ;

SCHLESINGER, Z ;

CANFIELD, PC ;

FISK, Z .

PHYSICAL REVIEW LETTERS, 1994, 72 (04) :522-525

[3] SUPERCONDUCTING ENERGY GAPS IN YBA2CU3O7 AND BI2SR2CACU2O8 [J].

EKINO, T ;

MINAMI, T ;

FUJII, H ;

AKIMITSU, J .

PHYSICA C, 1994, 235 :1899-1900

[4] ELECTRON-TUNNELING STUDY OF NBSE3 [J].

EKINO, T ;

AKIMITSU, J .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1987, 26 :625-626

[5] Tunneling measurements of the energy gap in CeRhSb and CeNiSn [J].

Ekino, T. ;

Takabatake, T. ;

Tanaka, H. ;

Fujii, H. .

PHYSICA B-CONDENSED MATTER, 1995, 206 :837-839

[6]

Ekino T., 1992, STUDIES HIGH TEMPERA, V9, P259

[7] ELECTRON-TUNNELING INTO INTERMEDIATE-VALENCE MATERIALS [J].

GUNTHERODT, G ;

THOMPSON, WA ;

HOLTZBERG, F ;

FISK, Z .

PHYSICAL REVIEW LETTERS, 1982, 49 (14) :1030-1033

[8] WEAK-COUPLING THEORY OF THE PERIODIC ANDERSON MODEL IN INFINITE DIMENSIONS [J].

HIRASHIMA, DS ;

MUTOU, T .

PHYSICA B, 1994, 199 :206-208

[9] HYBRIDIZATION GAP IN CE3BI4PT3 [J].

HUNDLEY, MF ;

CANFIELD, PC ;

THOMPSON, JD ;

FISK, Z ;

LAWRENCE, JM .

PHYSICAL REVIEW B, 1990, 42 (10) :6842-6845

[10] NEUTRON-DIFFRACTION STUDY OF ANTIFERROMAGNETIC ORDER IN THE KONDO COMPOUND CEPTSN [J].

KADOWAKI, H ;

EKINO, T ;

IWASAKI, H ;

TAKABATAKE, T ;

FUJII, H ;

SAKURAI, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1993, 62 (12) :4426-4437

← 1 2 3 →