磁场对含杂质的介观结构中持续电流的影响

霍淑芬; 肖景林

doi:null

您当前的位置：

首页 >

文章列表页 >

磁场对含杂质的介观结构中持续电流的影响

论文 | 更新时间：2020-08-12

- 磁场对含杂质的介观结构中持续电流的影响
- Effect of Magnetic Field on Persistent Currents in Mesoscopic Structure with an Impurity
- 发光学报 2008年29卷第2期页码：225-228
- 作者机构：
  
  1. 内蒙古民族大学, 物理与电子信息学院,内蒙古通辽,028043
  2. 河北科技师范学院, 数理系,河北秦皇岛,066004
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(10347002,10747002)()
- DOI：
  中图分类号： O472.4;O469
- 收稿日期：2007-07-12，
  
  修回日期：2007-11-06，
  
  纸质出版日期：2008-03-20
- 稿件说明：
移动端阅览
霍淑芬, 肖景林. 磁场对含杂质的介观结构中持续电流的影响[J]. 发光学报, 2008,29(2): 225-228

HUO Shu-fen, XIAO Jing-lin. Effect of Magnetic Field on Persistent Currents in Mesoscopic Structure with an Impurity[J]. Chinese Journal of Luminescence, 2008,29(2): 225-228
霍淑芬, 肖景林. 磁场对含杂质的介观结构中持续电流的影响[J]. 发光学报, 2008,29(2): 225-228 DOI：

HUO Shu-fen, XIAO Jing-lin. Effect of Magnetic Field on Persistent Currents in Mesoscopic Structure with an Impurity[J]. Chinese Journal of Luminescence, 2008,29(2): 225-228 DOI：

摘要

采用量子波导理论

研究了含杂质的介观结构中电子的透射几率和持续电流。结果表明:电子的透射几率及持续电流均随磁通量的变化作周期性振荡

周期大小是1;无论是否存在杂质

反共振(

=0)均出现在ƒ=0.5的位置(当0≤ƒ

1)。当两电子库间电流发生反转时

双Aharonov-Bohm环各环中的持续电流的大小均发生明显改变。

Abstract

Recent developments of fabrication techniques have made available structure whose dimensions are much smaller than the characteristic length

such as 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

and one of the interesting phenomena is the persistent current in a ring threaded by magnetic flux. The purpose of this paper is to reveal the behavior of the persistent currents of mesoscopic structure with an impurity by the quantum waveguide theory. It is found that both the transmission coefficient of electron and persistent currents oscillate periodically with changing of magnetic flux with a period of ƒ=1. In the region of 0≤ƒ<1

the antiresonance occurs at ƒ=0.5. When the flowing direction of the current reverses

the amplitude of persistent current in each ring of the double Aharonov-Bohm rings changes.

关键词

Keywords

references

Buttiker M,Imry Y,Landauer R.Josephson behavior in small normal one-dimensional rings[J].Phys.Lett.A,1983,96(7):365-367.

Levy L P,Dolan G,Unsmuir J D,et al.Magnetization of mesoscopic copper ring:Evidence for persistent currents[J].Phys.Rev.Lett.,1990,64(17):2074-2077.

Chandrasekhar V,Webb A,Brady M J,et al.Magnetic response of a single isolated gold loop[J].Phys.Rev.Lett.,1991,67(25):3578-3581.

Mailly D,Chapelier C,Benoit A.Experimental observation of persistent currents in GaAs-AlGaAs single loop[J].Phys.Rev.Lett.,1993,70(13):2020-2023.

Areek T P,Jayannavar A M,Singha Deo P.Effect of impurity on the current magnification in the mesoscopic open ring[J].Phys.Rev.B,1995,52(20):14657-14663.

Jayannavar A M,Singha Deo P,Pareek T P.Current magnification and circulating currents in mesoscopic rings[J].Phys.B,1995,212(3):261-266.

Zhang Yi,Xiao Jinglin.Persistent current in double Aharonov-Bohm ring connected to electron reservoirs[J].Commun.Theor.Phys.,2007,47(3):573-576.

Li Hongming,Xiao Jinglin.Persistent currents in the mesoscopic structure with an impurity[J].Chin.J.Lumin.(发光学报),2007,28(4):489-492 (in English).

Wu Hanchun,Guo Yong,Chen Xinyi,et al.Giant persistent current in a quantum ring with multiple arms[J].Phys.Rev.B,2003,68(12):125330-1-5.

Li Mongming,Xiao Jinglin.The persistent currents in triple-arm AB ring with an impurity[J].Phys.B,2007,396(1-2):91-94.

Zhang Ying,Xiao Jinglin.Persistent currents in trple-arm ring[J].Chin.J.Lumin.(发光学报),2007,28(3):321-324 (in Chinese).

Xia J B.Quantun waveguide theory for mesoscopic structures[J].Phys.Rev.B,1992,45(7):3593-3599.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

含杂质的三臂环中的持续电流

含杂质的介观结构中的持续电流

三臂环中的持续电流

双stub介观环结构中的电子输运特征