Superconducting fluctuations in a mesoscopic ring structure. Little-Parks oscillation in fluctuation regime

被引：6

作者：

Hayashi, M ^{[1
]}

Ebisawa, H ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Informat Sci, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2001年 / 352卷 / 1-4期

关键词：

Little-Parks oscillation; superconducting fluctuation; Ginzburg-Landau theory; density of states;

D O I：

10.1016/S0921-4534(00)01722-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconducting fluctuation in a mesoscopic superconducting ring is studied and its effect on the Little-Parks oscillation is discussed. We introduce Ginzburg-Landau type effective action to describe the fluctuation of the order parameter and treat the nonlinear term by Hartree-Fock approximation. It is shown that the strength of the superconducting fluctuation varies as a function of the magnetic flux enclosed in the ring. This phenomenon is expected to be responsible for the experimentally observed reduction of the amplitude of Little-Parks oscillation. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：191 / 194

页数：4

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