Current fluctuation in high-Tc superconductors

被引：0

作者：

Asai, T ^{[1
]}

Yoshida, N

Tanaka, Y

Inoue, J

Kashiwaya, S

机构：

[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648063, Japan

[2] JST, Japan Sci & Technol Corp, CREST, Yokohama, Kanagawa, Japan

[3] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2001年 / 62卷 / 1-2期

关键词：

superconductors; electrical conductivity; transport properties;

D O I：

10.1016/S0022-3697(00)00141-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the current fluctuation in normal metal/ferromagnetic insulator/high T-c superconductor junctions by calculating the shot noise for various transparencies of the junctions. The formation of zero energy state (ZES) at the interface influences the current fluctuation significantly. In the tunneling limit. the ratio of the noise power to current becomes 0 at zero voltage, when the ZES is formed at the interface. In the presence of a ferromagnetic insulator, the ratio deviates from 0 even for the tunneling limit. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：261 / 264

页数：4

共 26 条

[1] Spatially continuous zero-bias conductance peak on (110) YBa2Cu3O7-delta surfaces [J].

Alff, L ;

Takashima, H ;

Kashiwaya, S ;

Terada, N ;

Ihara, H ;

Tanaka, Y ;

Koyanagi, M ;

Kajimura, K .

PHYSICAL REVIEW B, 1997, 55 (22) :14757-14760

[2] Current fluctuations in mesoscopic systems with Andreev scattering [J].

Anantram, MP ;

Datta, S .

PHYSICAL REVIEW B, 1996, 53 (24) :16390-16402

[3]

ANDREEV AF, 1964, SOV PHYS JETP-USSR, V19, P1228

[4] Low-temperature anomaly in the Josephson critical current of junctions in d-wave superconductors [J].

Barash, YS ;

Burkhardt, H ;

Rainer, D .

PHYSICAL REVIEW LETTERS, 1996, 77 (19) :4070-4073

[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] ANDREEV SCATTERING IN ANISOTROPIC SUPERCONDUCTORS [J].

BRUDER, C .

PHYSICAL REVIEW B, 1990, 41 (07) :4017-4032

[7] SCATTERING-THEORY OF CURRENT AND INTENSITY NOISE CORRELATIONS IN CONDUCTORS AND WAVE GUIDES [J].

BUTTIKER, M .

PHYSICAL REVIEW B, 1992, 46 (19) :12485-12507

[8] DOUBLED SHOT-NOISE IN DISORDERED NORMAL-METAL SUPERCONDUCTOR JUNCTIONS [J].

DEJONG, MJM ;

BEENAKKER, CWJ .

PHYSICAL REVIEW B, 1994, 49 (22) :16070-16073

[9]

DEJONG MJM, 1997, NATO ASI E, V345

[10] MIDGAP SURFACE-STATES AS A NOVEL SIGNATURE FOR D(X(A)(2)-X(B)(2))-WAVE SUPERCONDUCTIVITY [J].

HU, CR .

PHYSICAL REVIEW LETTERS, 1994, 72 (10) :1526-1529

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