Metal-Bosonic Insulator-Superconductor Transition in Boron-Doped Granular Diamond

被引：49
|
作者：
Zhang, Gufei [1 ]
Zeleznik, Monika [2 ]
Vanacken, Johan [1 ]
May, Paul W. [2 ]
Moshchalkov, Victor V. [1 ]
机构：
[1] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium
[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 07期
基金：
英国工程与自然科学研究理事会;
关键词：
RESISTANCE-PEAK; THIN-FILMS; T-C; TEMPERATURE; RESISTIVITY; BI2SR2CACU2O8+DELTA; PSEUDOGAP; ANOMALIES; FIBERS; ORIGIN;
D O I：
10.1103/PhysRevLett.110.077001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In a variety of superconductors, mostly in two-dimensional (2D) and one-dimensional (1D) systems, the resistive superconducting transition R(T) demonstrates in many cases an anomalous narrow R(T) peak just preceding the onset of the superconducting state R = 0 at T-c. The amplitude of this R(T) peak in 1D and 2D systems ranges from a few up to several hundred percent. In three-dimensional (3D) systems, however, the R(T) peak close to T-c is rarely observed, and it reaches only a few percent in amplitude. Here we report on the observation of a giant (similar to 1600%) and very narrow (similar to 1 K) resistance peak preceding the onset of superconductivity in heavily boron-doped diamond. This anomalous R(T) peak in a 3D system is interpreted in the framework of an empirical model based on the metal-bosonic insulator-superconductor transitions induced by a granularity-correlated disorder in heavily doped diamond. DOI: 10.1103/PhysRevLett.110.077001
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页数：5
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