Coherent transport in extremely underdoped Nd1.2Ba1.8Cu3Oz nanostructures

Carillo, Franco; De Luca, G. M.; Montemurro, D.; Papari, G.; Salluzzo, M.; Stornaiuolo, D.; Tafuri, F.; Beltram, Fabio

doi:10.1088/1367-2630/14/8/083025

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Proximity-effect and resistance magneto-fluctuation measurements in submicron Nd 1.2Ba 1.8Cu 3O z (NBCO) nano-loops are reported to investigate coherent charge transport in the non-superconducting state. We find an unexpected inhibition of Cooper pair transport, and a destruction of the induced superconductivity, by lowering the temperature from 6 K to 250 mK. This effect is accompanied by a significant change in the conductance-voltage characteristics and the zero bias conductance response to the magnetic field, pointing to the activation of a strong pair-breaking mechanism at lower temperature. The data are discussed in the framework of mesoscopic effects specific to superconducting nanostructures, proximity effect and high temperature superconductivity

Titolo:	Coherent transport in extremely underdoped Nd1.2Ba1.8Cu3Oz nanostructures
Autori:	CARILLO, Franco De Luca G. M. Montemurro D. Papari G. Salluzzo M. Stornaiuolo D. Tafuri F. BELTRAM, Fabio mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2012
Rivista:	NEW JOURNAL OF PHYSICS
Abstract:	Proximity-effect and resistance magneto-fluctuation measurements in submicron Nd 1.2Ba 1.8Cu 3O z (NBCO) nano-loops are reported to investigate coherent charge transport in the non-superconducting state. We find an unexpected inhibition of Cooper pair transport, and a destruction of the induced superconductivity, by lowering the temperature from 6 K to 250 mK. This effect is accompanied by a significant change in the conductance-voltage characteristics and the zero bias conductance response to the magnetic field, pointing to the activation of a strong pair-breaking mechanism at lower temperature. The data are discussed in the framework of mesoscopic effects specific to superconducting nanostructures, proximity effect and high temperature superconductivity
Handle:	http://hdl.handle.net/11384/7305
Appare nelle tipologie:	1.1 Articolo in rivista

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