Electron-tunneling measurements of low-Tc single-layer Bi2+xSr2-yCuO6+δ: Evidence for a scaling disparity between superconducting and pseudogap states

被引：13

作者：

Jacobs, Th ^{[1
]}

Katterwe, S. O. ^{[1
]}

Motzkau, H. ^{[1
]}

Rydh, A. ^{[1
]}

Maljuk, A. ^{[2
]}

Helm, T. ^{[3
]}

Putzke, C. ^{[4
]}

Kampert, E. ^{[5
]}

Kartsovnik, M. V. ^{[3
]}

Krasnov, V. M. ^{[1
]}

机构：

[1] Stockholm Univ, Dept Phys, AlbaNova Univ Ctr, SE-10691 Stockholm, Sweden

[2] Leibniz Inst Solid State & Mat Res IFW Dresden, D-01171 Dresden, Germany

[3] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

[4] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[5] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlab Dresden, DE-01314 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 21期

基金：

瑞典研究理事会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTOR; UPPER CRITICAL-FIELD; TRANSITION-TEMPERATURE; CUPRATE; GAP; BI2SR2CACU2O8+DELTA; SPECTROSCOPY; FLUCTUATIONS; DEPENDENCE; ORIGIN;

D O I：

10.1103/PhysRevB.86.214506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We experimentally study intrinsic tunneling and high magnetic field (up to 65 T) transport characteristics of the single-layer cuprate Bi2+xSr2-yCuO6+delta, with a very low superconducting critical temperature T-c less than or similar to 4 K. It is observed that the superconducting gap, the collective bosonic mode energy, the upper critical field, and the fluctuation temperature range are scaling down with T-c, while the corresponding pseudogap characteristics remain the same as in high-T-c cuprates with 20 to 30 times higher T-c. The observed disparity of the superconducting and pseudogap scales clearly reveals their different origins. DOI: 10.1103/PhysRevB.86.214506

引用

页数：8

共 5 条

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