Large fluctuations near the superconducting transition in the underdoped Bi2212

被引：12

作者：

Di Castro, D

Saini, NL

Bianconi, A

Lanzara, A

机构：

[1] Univ Roma La Sapienza, Unita INFM, I-00185 Rome, Italy

[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 332卷 / 1-4期

关键词：

fluctuation conductivity; anomalous underdoped phase; superfluid density; vortex-anti-vortex binding;

D O I：

10.1016/S0921-4534(99)00713-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Penetration depth lambda(T) has been derived from the measurements of temperature-dependent complex conductivity on Bi2Sr2CaCu2O8+delta (Bi2212) superconducting system using a single-coil inductance method. Temperature dependence of lambda(T) in the vicinity of the superconducting transition temperature has been used to explore the fluctuations of the superconducting order parameter. Doping dependence of these fluctuations reveals that the fluctuation region in the underdoped system is far greater than in the optimally doped system. We find a linear doping dependence of the fluctuation region below T-c, suggesting that superfluid density might be the only parameter to control these fluctuations. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：405 / 410

页数：6

共 30 条

[1] Fluctuations in the microwave conductivity of YBa2Cu3O7-delta single crystals in zero dc magnetic field [J].