標題: Fano resonance in transport through a mesoscopic two-lead ring
作者: Voo, KK
Chu, CS
電子物理學系
Department of Electrophysics
公開日期: 1-Oct-2005
摘要: The ballistic transport through a one-dimensional two-lead ring at zero magnetic field is studied. We have focused on the case in which the potential in the ring does not define closed cavities or dots. Even in the absence of well-defined quasibound states, we find Fano profiles in the transmission probability. Those Fano profiles appear at energies corresponding to the standing-wave states in the ring, but their occurrence depends sensitively on the commensurability of the system parameters. When the system parameters are commensurate, the widths of the profiles at some energies are infinitesimally small. These findings suggest that the conventional understanding of the Fano profiles as a result of the interference effect of the transition through resonant states and nonresonant continuum of states, might not account for all the Fano profiles seen in the transport measurements. Moreover, the sensitivity and tunability of the resonance with respect to the system parameters may be usable in the fabrication of electrical nanodevices.
URI: http://dx.doi.org/10.1103/PhysRevB.72.165307
http://hdl.handle.net/11536/13177
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.72.165307
期刊: PHYSICAL REVIEW B
Volume: 72
Issue: 16
起始頁: 0
結束頁: 0
Appears in Collections:Articles


Files in This Item:

  1. d03f8fd00ae56a1a763a23d3a10ac9b8.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.