Effect of site dilution in the two-dimensional attractive Hubbard model

被引：4
|
作者：
Pradhan, Saurabh [1 ]
Pai, G. Venketeswara [1 ]
机构：
[1] Harish Chandra Res Inst, Chhatnag Rd, Allahabad 211019, Uttar Pradesh, India
来源：
PHYSICAL REVIEW B | 2018年 / 98卷 / 16期
关键词：
SUPERCONDUCTOR-INSULATOR TRANSITION; BCS-BEC CROSSOVER; PHASE-TRANSITIONS; SYSTEMS; FIELD; FILMS; LIMIT;
D O I：
10.1103/PhysRevB.98.165142
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the percolative superconducting transition as the density of randomly placed attractive centers grows in a host metal. Employing the Hubbard-Stratanovich transformation for the interaction and allowing for spatial, thermal fluctuations of the pairing field, we obtain real-space features of the transition from weak to strong coupling. Spectral and transport properties are studied in detail. BCS-BEC crossover is discussed in the context of site dilution of attractive centers.
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页数：8
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