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Transmission through a quantum dot in a four-terminal phase-coherent system
Sun, QF; Lin, TH; Sun, QF , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
1998
发表期刊JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN0953-8984
卷号10期号:16页码:3581-3593
摘要Motivated by the recent experiment by Schuster et al (Schuster R, Buks E, Heiblum M, Mahalu D, Umansky V and Shtrikman H 1997 Nature 385 417), we study a four-terminal phase-coherent system, each arm having a quantum dot embedded in it (dot 1 for studying and dot 0 for reference). Using the nonequilibrium-Green-function method, the open-circuit collector voltage v(4) is derived. We find the following features. (1) The phase behaviours are similar for all of the resonance peaks. (2) In a single resonance peak, the phase phi increases by pi on a scale of about the half-peak-width Gamma(omega). (3) An abrupt phase drop, by pi, occurs near the point half way between two consecutive peaks. These results agree well with experiment. We attribute the characteristic (3) to the off-diagonal linewidth of dot `, which is a single-electron effect. In addition, the crossover of the phase behaviour in going from the four-terminal system to a two-terminal system is studied. Finally, another manifestation of this off-diagonal linewidth is also discussed.
部门归属Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Chinese Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Conductance Oscillations Transport
学科领域Physics
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收录类别SCI
WOS记录号WOS:000073437200011
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12319
专题理论物理所1978-2010年知识产出
通讯作者Sun, QF , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
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Sun, QF,Lin, TH,Sun, QF , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.. Transmission through a quantum dot in a four-terminal phase-coherent system[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,1998,10(16):3581-3593.
APA Sun, QF,Lin, TH,&Sun, QF , Peking Univ, Dept Phys, Beijing 100871, Peoples R China..(1998).Transmission through a quantum dot in a four-terminal phase-coherent system.JOURNAL OF PHYSICS-CONDENSED MATTER,10(16),3581-3593.
MLA Sun, QF,et al."Transmission through a quantum dot in a four-terminal phase-coherent system".JOURNAL OF PHYSICS-CONDENSED MATTER 10.16(1998):3581-3593.
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