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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
Source PublicationJOURNAL OF PHYSICS-CONDENSED MATTER
KeywordConductance Oscillations Transport
AbstractMotivated 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.
1998
ISSN0953-8984
Volume10Issue:16Pages:3581-3593
Subject AreaPhysics
Indexed BySCI
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12319
Collection理论物理所科研产出_SCI论文
Corresponding AuthorSun, QF , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
Recommended Citation
GB/T 7714
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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