Microwave response of YBa2Cu3O6.95 crystals: Evidence for a multicomponent order parameter

被引：62

作者：

Srikanth, H ^{[1
]}

Willemsen, BA ^{[1
]}

Jacobs, T ^{[1
]}

Sridhar, S ^{[1
]}

Erb, A ^{[1
]}

Walker, E ^{[1
]}

Flukiger, R ^{[1
]}

机构：

[1] UNIV GENEVA,DPMC,CH-1211 GENEVA 4,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.55.R14733

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New features are reported in precision measurements of the complex microwave conductivity of high-quality YBa2Cu3O6.95 crystals grown in BaZrO3 crucibles. A third peak in the normal conductivity, sigma(1)(T), at around 80 K, and enhanced pair conductivity sigma(2)(T) below similar to 65 K are observed. The data are inconsistent with a single order parameter, and instead are indicative of multicomponent superconductivity. Overall, these results point to the presence of multiple pairing interactions in YBa2Cu3O6.95 and also provide a natural explanation to account for the low-temperature 35-K conductivity peak observed in all YBa2Cu3O6.95 crystals.

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页码：14733 / 14736

页数：4

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