SUBGAP STRUCTURE AS FUNCTION OF THE BARRIER IN ATOM-SIZE SUPERCONDUCTING TUNNEL-JUNCTIONS

被引：95

作者：

VANDERPOST, N ^{[1
]}

PETERS, ET ^{[1
]}

YANSON, IK ^{[1
]}

VANRUITENBEEK, JM ^{[1
]}

机构：

[1] VERKIN LOW TEMP PHYS & ENGN INST, KHARKOV 310164, UKRAINE

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.73.2611

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a mechanically controllable breakjunction we study superconducting tunnel junctions of atom size. The vacuum barrier is adjusted by controlling the distance between the electrodes to give barrier transparencies ranging over 2 orders of magnitude. We observe a systematic variation of the subgap current steps at eV = 2 Delta/n, for n = 2 and n = 3 in excellent agreement with theories of multiparticle tunneling and multiple Andreev reflection.

引用

页码：2611 / 2613

页数：3

共 20 条

[1] TUNNELING BETWEEN SUPERCONDUCTORS
AMBEGAOKAR, V
BARATOFF, A
[J]. PHYSICAL REVIEW LETTERS, 1963, 10 (11) : 486 - &
[2] SUPERCONDUCTING TUNNELING WITHOUT THE TUNNELING HAMILTONIAN .2. SUBGAP HARMONIC STRUCTURE
ARNOLD, GB
[J]. JOURNAL OF LOW TEMPERATURE PHYSICS, 1987, 68 (1-2) : 1 - 27
[3] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION
BLONDER, GE
TINKHAM, M
KLAPWIJK, TM
[J]. PHYSICAL REVIEW B, 1982, 25 (07): : 4515 - 4532
[4] INVESTIGATION OF SUBGAP STRUCTURES IN HIGH-QUALITY NB/ALOX/NB TUNNEL-JUNCTIONS
CRISTIANO, R
FRUNZIO, L
MONACO, R
NAPPI, C
PAGANO, S
[J]. PHYSICAL REVIEW B, 1994, 49 (01): : 429 - 440
[5] EVEN-ODD SYMMETRY-BREAKING IN THE NSN COULOMB-BLOCKADE ELECTROMETER
EILES, TM
MARTINIS, JM
DEVORET, MH
[J]. PHYSICA B, 1993, 189 (1-4): : 210 - 217
[6] POSSIBLE OBSERVATION OF MULTIPLE-PARTICLE TUNNELING IN NIOBIUM TUNNEL-JUNCTIONS
FODEN, CL
RANDO, N
VANDORDRECHT, A
PEACOCK, A
LUMLEY, J
PEREIRA, C
[J]. PHYSICAL REVIEW B, 1993, 47 (06) : 3316 - 3322
[7] THEORIES OF SUBHARMONIC GAP STRUCTURES IN SUPERCONDUCTING JUNCTIONS
HASSELBE.LE
LEVINSEN, MT
SAMUELSE.MR
[J]. PHYSICAL REVIEW B, 1974, 9 (09): : 3757 - 3765
[8] EXPLANATION OF SUB-HARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING CONTACTS
KLAPWIJK, TM
BLONDER, GE
TINKHAM, M
[J]. PHYSICA B & C, 1982, 109 (1-3): : 1657 - 1664
[9] OBSERVATION OF MULTIPLE ANDREEV REFLECTIONS IN SUPERCONDUCTING TUNNEL-JUNCTIONS
KLEINSASSER, AW
MILLER, RE
MALLISON, WH
ARNOLD, GB
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (11) : 1738 - 1741
[10] ONE-ATOM POINT CONTACTS
KRANS, JM
MULLER, CJ
YANSON, IK
GOVAERT, TCM
HESPER, R
VANRUITENBEEK, JM
[J]. PHYSICAL REVIEW B, 1993, 48 (19) : 14721 - 14724

← 1 2 →