Evidence of a Precursor Superconducting Phase at Temperatures as High as 180 K in RBa2Cu3O7-δ (R = Y, Gd, Eu) Superconducting Crystals from Infrared Spectroscopy

被引：111

作者：

Dubroka, A. ^{[1
,2
]}

Roessle, M. ^{[1
,2
]}

Kim, K. W. ^{[1
,2
]}

Malik, V. K. ^{[1
,2
]}

Munzar, D. ^{[3
]}

Basov, D. N. ^{[4
]}

Schafgans, A. A. ^{[4
]}

Moon, S. J. ^{[4
]}

Lin, C. T. ^{[5
]}

Haug, D. ^{[5
]}

Hinkov, V. ^{[5
]}

Keimer, B. ^{[5
]}

Wolf, Th. ^{[6
]}

Storey, J. G. ^{[7
]}

Tallon, J. L. ^{[7
]}

Bernhard, C. ^{[1
,2
]}

机构：

[1] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[2] Univ Fribourg, Fribourg Ctr Nanomat, CH-1700 Fribourg, Switzerland

[3] Masaryk Univ, Fac Sci, Dept Condensed Matter Phys, Brno 61137, Czech Republic

[4] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[5] Max Planck Inst Festkorperforsch, D-76021 Stuttgart, Germany

[6] Inst Festkorperphys, Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany

[7] Ind Res Ltd, MacDiarmid Inst, Lower Hutt, New Zealand

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 04期

基金：

瑞士国家科学基金会; 美国国家科学基金会;

关键词：

C-AXIS; OPTICAL PHONONS; PSEUDOGAP; CONDUCTIVITY; FLUCTUATIONS; YBA2CU3OY; ANOMALIES; PLASMONS; BEHAVIOR; STATE;

D O I：

10.1103/PhysRevLett.106.047006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a multilayer analysis of the infrared c-axis response of RBa2Cu3O7-delta (R = Y, Gd, Eu) provides important new information about the anomalous normal-state properties of underdoped cuprate high temperature superconductors. In addition to competing correlations which give rise to a pseudogap that depletes the low-energy electronic states below T* >> T-c, it enables us to identify the onset of a precursor superconducting state below T-ons > T-c. We map out the doping phase diagram of T-ons which reaches a maximum of 180 K at strong underdoping and present magnetic field dependent data which confirm our conclusions.

引用

页数：4

共 35 条

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