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Quantum interference effect of a mesoscopic ring interrupted by a tunnelbarrier

✍ Scribed by D. Takai; K. Ohta

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
181 KB
Volume
17
Category
Article
ISSN
0749-6036

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✦ Synopsis

We show that a scattering matrix can be used to calculate the transmission probability for a pure mesoscopic ring that has a circumference short compared with the phase coherence length that is interrupted by a clean tunnel barrier. The oscillation exhibits a period of (2 \pi) or (\pi), depending on the thickness of the barrier, as a function of the electrostatic phase shift that arises from the electrostatic potential applied to one branch of the ring. These results are independent of the parity of (\mathrm{k}{p} \mathrm{~L}\left(\mathrm{k}{p}\right.) is the Fermi wave number, (L) is half of the path length of the ring.). (c) 1995 Academic Press Limited

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