双stub介观环结构中的电子输运特征

黄有利; 肖景林

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双stub介观环结构中的电子输运特征

研究论文 | 更新时间：2020-08-11

- 双stub介观环结构中的电子输运特征
- Transport Properties of the Electron in One-dimensional Double Stub Mesoscopic Structures
- 发光学报 2006年27卷第1期页码：27-30
- 作者机构：
  
  内蒙古民族大学, 物理与机电学院, 内蒙古, 通辽, 028043
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(10347004)()
- DOI：
  中图分类号： O469
- 收稿日期：2004-11-30，
  
  修回日期：2005-03-20，
  
  纸质出版日期：2006-01-20
- 稿件说明：
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黄有利, 肖景林. 双stub介观环结构中的电子输运特征[J]. 发光学报, 2006,27(1): 27-30

HUANG You-li, XIAO Jing-lin. Transport Properties of the Electron in One-dimensional Double Stub Mesoscopic Structures[J]. Chinese Journal of Luminescence, 2006,27(1): 27-30
黄有利, 肖景林. 双stub介观环结构中的电子输运特征[J]. 发光学报, 2006,27(1): 27-30 DOI：

HUANG You-li, XIAO Jing-lin. Transport Properties of the Electron in One-dimensional Double Stub Mesoscopic Structures[J]. Chinese Journal of Luminescence, 2006,27(1): 27-30 DOI：

摘要

采用量子波导理论研究了双stub介观环结构中电子输运特性。结果表明电子透射系数随stub的长度和环的大小而周期地振动

对环的周长和stub的长度做适当的调整

能使电子输运达到100%。并且比较了单stub介观环结构和双stub介观环结构对电子输运的影响

发现双stub的介观环结构对电子输运调制要比单stub介观环结构好。理论研究不仅对基础物理而且对量子器件研究均有重要意义。

Abstract

During the last two decades

the development of fabrication technique have made available structures whose dimensions are much smaller than the characteristic length such as the mean free path and phase coherence length of an electron. These structures are referred to as mesoscopic system. The physical properties of the mesoscopic system are strongly affected by quantum interference effects. So it is an important question for discussing the transport properties of the electron in mesoscopic structures and it is physics gist to construct quantum devices. Up to now there have been lots of investigations about the mesoscopic system by using varieties theories and experimental methods. But the transport properties of the electron in one-dimensional double stub mesoscopic structures have not been studied. We discuss the transmission properties of electron in double stub mesoscopic structures with quantum waveguide theory. For the sake of simplicity we consider a coherent

dissipationless

quasi-one-dimensional system

and neglect scattering at the junction. We found that the transmission coefficient of electron in one-dimensional double stub mesoscopic structures oscillates with changing the length of the stub and the length of the ring. The transmission coefficient of the electron can be modulated up to 100% by modulating length of the stub and the length of the ring and it is very interesting to notice that the transmission coefficient of the electron modulated by two stubs is better than that modulated by one stub. The theory study is maybe valuable for the study of quantum devices.

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references

Smith C G R.Low-dimensional quantum devices[J].Prog.Phys.,1996,59:235-282.

Yan Shousheng,Gan Zizhao.Mesoscopic Physics[M].Peking University Publishing House,1995,99-100 (in Chinese).

Webb R,Washburn S,Umbach C P,et al.Observation of h/e Aharonov-Bohm oscillations in normal-metal rings[J].Phys.Rev.Lett.,1985,54:2696-2699.

Buttiker M,Imry Y,Landauer R,et al.Behavior in small normal one-dimensional rings[J].Phys.Lett.A,1983,96:365-367.

Buttiker M,Imry Y,Pinkas S,et al.Generalized many-channel conductance formula with application to small rings[J].Phys.Rev.B,1985,31:6207-6215.

Wees Van B J,Houten H V,Beenakker C W J.Quantized conductance of point contacts in a two-dimensional electron gas[J].Phys.Rev.Lett.,1988,60:848-850.

Wharam D A,Thornton T J,Newbury R,et al.One-dimensional transport and the quantisation of the ballistic resistance[J].J.Phys.C,1988,21:L 209-214.

Kirczenov G.Resonant conduction in ballistic quantum channels[J].Phys.Rev.B,1989,39:10452-10455.

Mailly D,Chapelier C,Benoit A.Experimental observation of persistent currents in GaAs-AlGaAs single loop[J].Phys.Rev.Lett.,1993,70:2020-2023.

Cao Y J,Hou Z L,Liu Y Y.Quantum waveguide properties of a comb structure with a ring[J].Phys.Rev.B,2003,68:153304-153307.

Orellana,P A,Guevara M L Ladrn,Pacheco M,et al.Conductance and persistent current of a quantum ring coupled to a quantum wire under external fields[J].Phys.Rev.B,2003,68:195321-195327.

Sosl F,Macucci M,Ravaioli U,et al.On the possibility of transistor action based on quantum interference phenomena[J].Appl.Phys.Lett.,1989,54:350-358.

Sosl F,Macucci M,Ravaioli U,et al.Theory for a quantum modulated transistor[J].J.Appl.Phys.,1989,66:3892-3906.

Porod W,Shao Z,Lent C S.Transmission resonance and zeros in quantum waveguides with resonantly coupled cavities[J].Phys.Lett.,1992,61:1350-1352.

Porod W,Shao Z,Lent C S.Resonance-antiresonance line shape for transmission in quantum waveguides with resonanty coupled cavities[J].Phys.Rev.B,1993,48:8495-8498.

Xia J B.Quantum waveguide theory for mesoscopic structures[J].Phys.Rev.B,1992,45:3593-3599.

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