Fano Resonance and Persistent Currents in a Mesoscopic Open Ring with a Flux Loop in Side-Branch

韦联福; 王顺金; 贾焕玉; 揭泉林

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Fano Resonance and Persistent Currents in a Mesoscopic Open Ring with a Flux Loop in Side-Branch

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摘要

Persistent circulating currents in a mesoscopic open ring with side-branch structures are derived by transfer matrix method in the framework of quantum waveguide theory on networks.The behavior of transmission probability may show the Fano resonance in the presence of geometric scattering of side-branch structures.It is shown that persistent circulating currents in the main loop with equal length of both arms in the absence of magnetic Aux occur near the Fermi wave vectors where the Fano resonance appears.The numerical results show that a larger persistent current is associated with a stronger Fano resonance.The persistent circulating currents can be controlled by the Aux of side-branch structure.

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来源
《中国物理快报：英文版》 |1998年第2期|P.128-130|共3页
作者
韦联福; 王顺金; 贾焕玉; 揭泉林;
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作者单位

Institute of Modern Physics and Department of Applied Physics Southwest Jiaotong University Chengdu 610031;

Department of Modern Physics Lanzhou University Lanzhou 730000;

Institute of Modern Physics and Department of Applied Physics Southwest Jiaotong University Chengdu 610031;

Institute of Modern Physics and Department of Applied Physics Southwest Jiaotong University Chengdu 610031;

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原文格式 PDF
正文语种 chi
中图分类海洋基础科学;
关键词
structure.; currents; branch;

Fano Resonance and Persistent Currents in a Mesoscopic Open Ring with a Flux Loop in Side-Branch

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