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.
Large fluctuations near the superconducting transition in the underdoped Bi2212 / D., Di Castro; Saini, Naurang Lal; Bianconi, Antonio; A., Lanzara. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - STAMPA. - 332:1(2000), pp. 405-410. (Intervento presentato al convegno 1st Euroconference on Vortex Matter in Superconductors at Extreme Scales and Conditions tenutosi a IRAKLION, GREECE nel SEP 18-24, 1999) [10.1016/s0921-4534(99)00713-3].
Large fluctuations near the superconducting transition in the underdoped Bi2212
SAINI, Naurang Lal;BIANCONI, Antonio;
2000
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.