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

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

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

Proximity-effect and resistance magneto-fluctuation measurements in submicron Nd1.2Ba1.8Cu3Oz (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 6K 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:	F. Carillo GM De Luca D. Montemurro G. Papari M. Salluzzo D. Stornaiuolo TAFURI, Francesco F. Beltram 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 Nd1.2Ba1.8Cu3Oz (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 6K 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/11591/193660
Appare nelle tipologie:	1.1 Articolo in rivista

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