Possible mechanism for fractional and negative magnetic flux in mesoscopic superconductors
Shi-Ping Zhou, Yao-Ming Shi, Bao-He Zhu, Guo-Qiao Zha
DOI 10.1103/PhysRevB.73.174503 · Physical Review B
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Abstract
We study vortex state transitions of mesoscopic superconducting disks using the Bogolubov-de Gennes equations. A vortex charge associated spin-orbit interaction is considered. This interaction induces an additional geometric phase and an intrinsic energy barrier for state transition of a different angular quantum number, leading to metastablility. This provides possible interpretations for experimental observations of the noninteger flux quanta and negative flux jump in mesoscopic superconductors [Geim et al., Nature (London) 407, 55 (2000)].
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.25 | Pressure not reported | unknown |
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