ANDREEV TUNNELING INTO A ONE-DIMENSIONAL JOSEPHSON-JUNCTION ARRAY

被引:9
作者
FALCI, G
FAZIO, R
TAGLIACOZZO, K
GIAQUINTA, G
机构
[1] UNIV CATANIA,IST FIS,I-95129 CATANIA,ITALY
[2] UNIV NAPOLI MOSTRA OLTREMARE,DIPARTIMENTO SCI FIS,I-80125 NAPLES,ITALY
来源
EUROPHYSICS LETTERS | 1995年 / 30卷 / 03期
关键词
D O I
10.1209/0295-5075/30/3/008
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this letter we consider Andreev tunnelling between a normal metal and a one-dimensional Josephson junction array with finite-range Coulomb energy. The I-V characteristics strongly deviate from the classical linear Andreev current. We show that the non-linear conductance possesses interesting scaling behaviour when the chain undergoes a T = 0 superconductor-insulator transition. When the chain is superconducting, the low-lying excitations are gapless and the I-V curves are power law. When the chain is insulating the Andreev current is blocked up to a threshold voltage, proportional to the inverse correlation length of the chain, which vanishes at the transition point.
引用
收藏
页码:169 / 174
页数:6
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