Strong dependence of multichannel ballistic transport on the geometric symmetry
✍ Scribed by M. Shin; K.W. Park; S. Lee; E.-H. Lee
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 79 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-6036
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✦ Synopsis
Ballistic electron transport in Aharonov-Bohm-type ring structures is investigated where the single-channel problem is nontrivially extended to the multichannel one in which the important interchannel scattering effect is considered. It is found that the S-matrix of a ring structure should reflect the geometric symmetry if the interchannel scattering effect is properly accounted for and that the symmetry relationships of the S-matrix plays a crucial role in the conductance oscillation behavior in ballistic two-dimensional rings. The magnetostatic as well as the electrostatic Aharonov-Bohm effects are studied for two ring structures of different symmetry.