Thermal broadening effect on the tunneling conductance in diffusive normal metal/superconductor junctions

被引：0

作者：

Shigeta, Iduru ^{[1
]}

Yokoyama, Takehito ^{[2
]}

Asano, Yasuhiro ^{[3
]}

Tanaka, Yukio ^{[2
,4
]}

机构：

[1] Kumamoto Natl Coll Technol, Dept Gen Educ, Kumamoto 8618603, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[3] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

[4] Japan Sci & Technol Agcy JST, CREST, Nagoya, Aichi 4648603, Japan

来源：

LOW TEMPERATURE PHYSICS, PTS A AND B | 2006年 / 850卷

关键词：

Andreev reflection; proximity effect; thermal broadening effect; zero-bias conductance peak; zero-bias conductance dip;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Using the circuit theory, we have studied how zero-bias conductance dip (ZBCD) and zero-bias conductance peak (ZBCP) are smeared by increasing temperature in the diffusive normal metal (DN) / s-wave or d-wave superconductor junctions. Tunneling conductance of the junction is calculated by changing the magnitudes of the resistance in DN, the Thouless energy in DN, the transparency of the insulating barrier, and the angle between the normal to the interface and the crystal axis of d-wave superconductors. We present a threshold temperature from a possible observation of the ZBCD and ZBCP in line shapes of tunneling conductance.

引用

页码：999 / +

页数：2

共 9 条

[1]

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

[2] CIRCUIT-THEORY OF ANDREEV CONDUCTANCE [J].

NAZAROV, YV .

PHYSICAL REVIEW LETTERS, 1994, 73 (10) :1420-1423

[3] Novel circuit theory of Andreev reflection [J].

Nazarov, YV .

SUPERLATTICES AND MICROSTRUCTURES, 1999, 25 (5-6) :1221-1231

[4] Theory of charge transport in diffusive normal metal/conventional superconductor point contacts [J].

Tanaka, Y ;

Golubov, AA ;

Kashiwaya, S .

PHYSICAL REVIEW B, 2003, 68 (05)

[5] Theory of charge transport in diffusive normal metal/unconventional singlet superconductor contacts [J].

Tanaka, Y ;

Nazarov, YV ;

Golubov, AA ;

Kashiwaya, S .

PHYSICAL REVIEW B, 2004, 69 (14) :144519-1

[6] Circuit theory of unconventional superconductor junctions [J].

Tanaka, Y ;

Nazarov, YV ;

Kashiwaya, S .

PHYSICAL REVIEW LETTERS, 2003, 90 (16) :4

[7] GENERALIZED DIFFUSION EQUATION FOR SUPERCONDUCTING ALLOYS [J].

USADEL, KD .

PHYSICAL REVIEW LETTERS, 1970, 25 (08) :507-&

[8] PROXIMITY EFFECT UNDER NONEQUILIBRIUM CONDITIONS IN DOUBLE-BARRIER SUPERCONDUCTING JUNCTIONS [J].

VOLKOV, AF ;

ZAITSEV, AV ;

KLAPWIJK, TM .

PHYSICA C, 1993, 210 (1-2) :21-34

[9] Influence of magnetic impurities on charge transport in diffusive-normal-metal/superconductor junctions [J].

Yokoyama, T ;

Tanaka, Y ;

Golubov, AA ;

Inoue, J ;

Asano, Y .

PHYSICAL REVIEW B, 2005, 71 (09)

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