SUPERCONDUCTING PHONON STRUCTURE IN THE TRANSITION FROM TUNNELING TO CONTACT REGIME

被引：6

作者：

RODRIGO, JG

AGRAIT, N

SIRVENT, C

VIEIRA, S

机构：

[1] Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, C-III, Universidad Autónoma de Madrid

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.50.7177

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the variation of the phonon structure in the conductance curves of superconducting variable-barrier junctions formed using a scanning tunneling microscope. The observed vanishing of this structure as the tunneling barrier decreases is explained as a result of the mixing of electronic states in the Andreev reflection process, whose importance increases as the tunneling barrier decreases.

引用

页码：7177 / 7179

页数：3

共 11 条

[1] ATOMIC-SCALE CONNECTIVE NECK FORMATION AND CHARACTERIZATION [J].

AGRAIT, N ;

RODRIGO, JG ;

SIRVENT, C ;

VIEIRA, S .

PHYSICAL REVIEW B, 1993, 48 (11) :8499-8501

[2] CONDUCTANCE STEPS AND QUANTIZATION IN ATOMIC-SIZE CONTACTS [J].

AGRAIT, N ;

RODRIGO, JG ;

VIEIRA, S .

PHYSICAL REVIEW B, 1993, 47 (18) :12345-12348

[3]

BINNIG G, 1986, IBM J RES DEV, V30, P355

[4] INFLUENCE OF ELECTRONS-PER-ATOM RATIO AND PHONON FREQUENCIES ON SUPERCONDUCTING TRANSITION-TEMPERATURE OF LEAD ALLOYS [J].

DYNES, RC ;

ROWELL, JM .

PHYSICAL REVIEW B, 1975, 11 (05) :1884-1894

[5] PHONON SPECTROSCOPY OF SUPERCONDUCTING NB USING POINT-CONTACT TUNNELING [J].

HUANG, Q ;

ZASADZINSKI, JF ;

GRAY, KE .

PHYSICAL REVIEW B, 1990, 42 (13) :7953-7959

[6]

McMillan W. L., 1969, SUPERCONDUCTIVITY, V1, P561

[7] SUBHARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING CONSTRICTIONS [J].

OCTAVIO, M ;

TINKHAM, M ;

BLONDER, GE ;

KLAPWIJK, TM .

PHYSICAL REVIEW B, 1983, 27 (11) :6739-6746

[8]

RODRIGO JG, 1994, PHYS REV B, V50, P380

[9] STRONG-COUPLING SUPERCONDUCTIVITY .I. [J].

SCALAPINO, DJ ;

SCHRIEFE.JR ;

WILKINS, JW .

PHYSICAL REVIEW, 1966, 148 (01) :263-+

[10]

WOLF EL, 1985, PRINCIPLES ELECTRON

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