带有AB环的T型结构中的电子输运性质

J4 ›› 2010, Vol. 27 ›› Issue (3): 356-360.

带有AB环的T型结构中的电子输运性质

赵志云许田兰燕娜周朋霞

南通大学理学院江苏南通 226007

收稿日期:2009-06-23 修回日期:2009-09-09 出版日期:2010-05-28 发布日期:2010-05-11
通讯作者: 赵志云（1978－）女，山东邹城人，硕士，讲师，主要从事介观物理中电子输运的研究。 E-mail:zhaozhiyun2004@ntu.edu.cn
基金资助:
南通大学科研启动基金资助

The electron transport property in T-shape structure with Aharonov-Bohm rings

ZHAO Zhi-Yun, XU Tian, LAN Yan-Na, ZHOU Peng-Xia

School of Science, Nantong University, Nantong 226007, China

Received:2009-06-23 Revised:2009-09-09 Published:2010-05-28 Online:2010-05-11

摘要/Abstract

摘要：

采用一维量子波导理论研究了带有AB环的类T型结构中的电子输运。在满足波函数的连续性以及电流的闭合性的情况下，得出了透射系数的解析表达式，并根据此表达式分析了电子的输运特性。结果显示：左右端的透射系数随磁通的变化产生典型的AB振荡。当改变中间的入射点的位置X时，左出射端的透射系数的大小随之改变，右输出端除附近外，均产生与磁通无关的全反射现象。入射点位置X的变化对透射系数的影响出现一种周期性的调制现象。体系结构轻微的偏离对系统的输运特性影响不大。

关键词: 光电子学∣量子波导理论∣AB环∣电子输运

Abstract:

Based on one-dimensional quantum waveguide theory for mesoscopic structures, the electron transport properties in T-shape structure with Aharonov-Bohm rings are investigated. In the case of ensuring the continuity of the wavefunction and the closing of the current at an intersection, we derive the analytic expression of the transmission coefficient and analyse the transmission properties.It is found that the transmission coefficient of the both sides shows typical AB oscillations with the change of magnetic flux. Altering the incident point of electron, the value of the left transmission coefficient also change, the right transmission coefficient appears total reflection phenomenon which has nothing to do with magnetic flux, but for in the vicinity of values . The location of the incident point cause periodic modulation to the transmission coefficient. Minor deviation from the structure of the system have little effect on transport properties.

Key words: optoelectronics∣quantum waveguide theory∣AB ring∣electron transport

赵志云许田兰燕娜周朋霞. 带有AB环的T型结构中的电子输运性质[J]. J4, 2010, 27(3): 356-360.

ZHAO Zhi-Yun, XU Tian, LAN Yan-Na, ZHOU Peng-Xia. The electron transport property in T-shape structure with Aharonov-Bohm rings[J]. J4, 2010, 27(3): 356-360.

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