Reentrant behavior of the phase stiffness in Josephson junction arrays

被引：18

作者：

Capriotti, L ^{[1
]}

Cuccoli, A

Fubini, A

Tognetti, V

Vaia, R

机构：

[1] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

[2] UdR Firenze, Ist Nazl Fis Mat, I-50019 Sesto Fiorentino, Italy

[3] Ist Nazl Fis Mat, UdR Firenze, I-50019 Sesto Fiorentino, FI, Italy

[4] CNR, Ist Fis Applicata Nello Carrara, I-50019 Sesto Fiorentino, FI, Italy

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 24期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.91.247004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The phase diagram of a 2D Josephson junction array with large substrate resistance, described by a quantum XY model, is studied by means of Fourier path-integral Monte Carlo. A genuine Berezinskii-Kosterlitz-Thouless transition is found up to a threshold value g(star) of the quantum coupling, beyond which no phase coherence is established. Slightly below g(star) the phase stiffness shows a reentrant behavior with temperature, in connection with a low-temperature disappearance of the superconducting phase, driven by strong nonlinear quantum fluctuations.

引用

页数：4

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