Current reversal of photon-assisted tunneling in a quantum dot connected to superconducting leads

被引：0
|
作者：
Cho, SY [1 ]
Kang, K
Ryu, CM
Kim, CK
机构：
[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea
[2] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea
[3] Chonbuk Natl Univ, Dept Phys, Chonju, South Korea
[4] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2001年 / 40卷 / 07期
关键词：
coulomb blockade; superconductor; quasiparticle transport; photon-assisted tunneling;
D O I：
10.1143/JJAP.40.4559
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the current reversal of the photon-assisted electron transport in a single level quantum dot connected to two superconductors. It is found that the direction of photon-assisted tunneling (PAT) current sensitively changes depending on the external frequency and on the electron energy level of the quantum dot. The frequency region for the reversal of the PAT current is determined by a small applied de-bias or the energy gap difference between the two connecting leads.
引用
收藏
页码：4559 / 4564
页数：6
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