DISTRIBUTION OF SUPERCONDUCTING ENERGY GAPS IN GDBA2CU3O7 OBTAINED FROM POINT-CONTACT SPECTROSCOPY

被引：16

作者：

AKIMENKO, AI ^{[1
]}

GOLL, G ^{[1
]}

VONLOHNEYSEN, H ^{[1
]}

GUDIMENKO, VA ^{[1
]}

机构：

[1] ACAD SCI UKSSR,INST LOW TEMP PHYS & ENGN,KHARKOV 310164,UKRAINE,USSR

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.46.6409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Point-contact spectra of GdBa2Cu3O7 (with Ag as counterelectrode) exhibit reproducible wide minima in the differential resistance dV/dI vs voltage V, which are attributed to the superconducting energy gap. The energy positions and widths of these gap features correspond to the gap distribution extracted earlier from YBa2Cu3O7 point-contact spectra (with narrow gap minima). A comparison with the Blonder-Tinkham-Klapwijk model suggests that the distribution of wide gaps in GdBa2Cu3O7 results from orificelike point contacts. The form of the spectra does not change when cooling below the antiferromagnetic transition at T(N) = 2.24 K.

引用

页码：6409 / 6412

页数：4

共 15 条

[1] TRANSITION TO GAPLESS SUPERCONDUCTIVITY IN YBA2(CU1-XZNX)3O7 [J].

AKIMENKO, AI ;

GOLL, G ;

YANSON, IK ;

VONLOHNEYSEN, H ;

AHRENS, R ;

WOLF, T ;

WUHL, H .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1991, 82 (01) :5-8

[2]

AKIMENKO AI, UNPUB

[3] TUNNELING AND PROXIMITY EFFECT STUDIES OF THE HIGH-TEMPERATURE SUPERCONDUCTORS [J].

BEASLEY, MR .

PHYSICA C, 1991, 185 :227-233

[4] SUPERCONDUCTIVITY IN OXIDES - TOWARD A UNIFIED PICTURE [J].

BISHOP, AR ;

MARTIN, RL ;

MULLER, KA ;

TESANOVIC, Z .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1989, 76 (01) :17-24

[5] 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

[6]

BORNEMANN HJ, 1990, THESIS U KARLSRUHE

[7] YBA2CU3O7-DELTA-AG-AL AL2O3 PB TUNNEL-JUNCTIONS BASED ON THE SUPERCONDUCTING PROXIMITY EFFECT [J].

GIJS, MAM ;

SCHOLTEN, D ;

VANROOY, T ;

GERRITS, AM .

APPLIED PHYSICS LETTERS, 1990, 57 (24) :2600-2602

[8]

GOLL G, 1992, FIZ NIZK TEMP+, V18, P593

[9] EVIDENCE FOR 2 GAPS IN THE SUPERCONDUCTOR YBA2CU3O7-DELTA [J].

HOFMANN, U ;

KELLER, J ;

RENK, K ;

SCHUTZMANN, J ;

OSE, W .

SOLID STATE COMMUNICATIONS, 1989, 70 (03) :325-327

[10] ELECTRON-TUNNELING AND THE ENERGY-GAP IN BI2SR2CACU2OX [J].

LEE, M ;

MITZI, DB ;

KAPITULNIK, A ;

BEASLEY, MR .

PHYSICAL REVIEW B, 1989, 39 (01) :801-803

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