Cooper pair cotunneling in single charge transistors with dissipative electromagnetic environment.

IF 9 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Physical review letters Pub Date : 2003-11-07 Epub Date: 2003-11-03 DOI:10.1103/PhysRevLett.91.197002
S V Lotkhov, S A Bogoslovsky, A B Zorin, J Niemeyer
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引用次数: 22

Abstract

We observed current-voltage characteristics of superconducting single charge transistors with on-chip resistors of R approximately R(Q)=h/4e(2) approximately 6.45 kOmega, which are explained in terms of Cooper pair cotunneling. Both the effective strength of Josephson coupling and the cotunneling current are modulated by the gate-induced charge on the transistor island. For increasing values of the resistance R we found the Cooper pair current at small transport voltages to be dramatically suppressed.

耗散电磁环境下单电荷晶体管的库珀对共隧道效应。
我们观察了片上电阻R约为R(Q)=h/4e(2)约为6.45 kOmega的超导单电荷晶体管的电流-电压特性,并用库珀对共隧道解释了这一特性。晶体管岛上的栅极感应电荷可调制约瑟夫森耦合的有效强度和共隧电流。随着电阻R值的增加,我们发现在小传输电压下的库珀对电流被显著抑制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physical review letters
Physical review letters 物理-物理:综合
CiteScore
16.50
自引率
7.00%
发文量
2673
审稿时长
2.2 months
期刊介绍: Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks
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