The interplay between quantum interference effects and superconductivity has been investigated in infinite layer Sr1-xLaxCuO2±δ thin films by using a combination of standard dc electric transport measurements and noise characterization. A marked resistivity upturn at a temperature of 110 K has been observed in underdoped samples, which also showed a superconductive transition at about 25 K. The resistivity behavior has been attributed to weak localization and has been investigated by detailed low-frequency voltage-spectral density measurements. In particular, peculiar linear dependence of the 1/f noise on the bias current is found in the weak-localization regime, whereas the usual quadratic dependence of the 1/f component occurs in the superconducting and metallic regions.

Noise Spectroscopy Investigation of Interplay Between Quantum Interference Effects and Superconductivity in Infinite Layer Cuprates

Barone C.
Writing – Original Draft Preparation
;
Galdi A.
Investigation
;
Pagano S.
Writing – Review & Editing
;
Maritato L.
Supervision
2016-01-01

Abstract

The interplay between quantum interference effects and superconductivity has been investigated in infinite layer Sr1-xLaxCuO2±δ thin films by using a combination of standard dc electric transport measurements and noise characterization. A marked resistivity upturn at a temperature of 110 K has been observed in underdoped samples, which also showed a superconductive transition at about 25 K. The resistivity behavior has been attributed to weak localization and has been investigated by detailed low-frequency voltage-spectral density measurements. In particular, peculiar linear dependence of the 1/f noise on the bias current is found in the weak-localization regime, whereas the usual quadratic dependence of the 1/f component occurs in the superconducting and metallic regions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4670958
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