Microwave measurements of the in-plane and c-axis conductivity in HgBa2CuO4+δ: Discriminating between superconducting fluctuations and pseudogap effects

被引：41

作者：

Grbic, M. S. ^{[1
]}

Barisic, N. ^{[2
,3
]}

Dulcic, A. ^{[1
]}

Kupcic, I. ^{[1
]}

Li, Y. ^{[4
]}

Zhao, X. ^{[2
,5
]}

Yu, G. ^{[4
]}

Dressel, M. ^{[3
]}

Greven, M. ^{[6
,7
]}

Pozek, M. ^{[1
]}

机构：

[1] Univ Zagreb, Fac Sci, Dept Phys, HR-10002 Zagreb, Croatia

[2] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA

[3] Univ Stuttgart, Inst Phys 1, D-70550 Stuttgart, Germany

[4] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[5] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

[6] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[7] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 09期

基金：

美国国家科学基金会;

关键词：

barium compounds; doping; high-temperature superconductors; mercury compounds; superconducting energy gap; TUNNELING SPECTROSCOPY; GAP; BI2SR2CACU2O8+DELTA; CRYSTALS; CAVITY; ORDER; MODEL;

D O I：

10.1103/PhysRevB.80.094511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An approach to microwave measurements is used in order to determine both, the in-plane and out-of-plane conductivity of the high-T-c superconductor HgBa2CuO4+delta near optimal doping. Unlike the ab-plane conductivity, the c-axis conductivity is highly sensitive to superconducting fluctuations. From a single c-axis data set, we can clearly discern the opening of the pseudogap at T-*=185(15) K, the appearance of the superconducting fluctuations at a much lower temperature T-'=105(2) K, and the full transition to the superconducting state at the critical temperature T-c=94.3 K. Thus, with the present high sensitivity, we establish that the extent of the superconducting fluctuations is only about 10 K above T-c.

引用

页数：5

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