Volume 51, Number 2, July 2000
|Page(s)||181 - 187|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Parity effect in a mesoscopic superconducting ring
Department of Physics, Chonbuk National University -
664-14 1-ga Duckjin-Dong Duckjin-Gu
Chonju, Chonbuk 561-756, South Korea
Corresponding author: email@example.com
Accepted: 22 May 2000
We study a mesoscopic superconducting ring threaded by a magnetic flux when the single-particle level spacing is not negligible. It is shown that, for a superconducting ring with even parity, the behavior of persistent current is equivalent to what is expected in a bulk superconducting ring. On the other hand, we find that a ring with odd parity shows anomalous behavior such as fluxoid quantization at half-integral multiples of the flux quantum and paramagnetic response at low temperature. We also discuss how the parity effect in the persistent current disappears as the temperature is raised or the size of the ring increases.
PACS: 74.20.Fg – BCS theory and its development / 73.23.Ra – Persistent currents / 73.23.-b – Mesoscopic systems
© EDP Sciences, 2000
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