http://www.cnr.it/ontology/cnr/individuo/prodotto/ID166856

Andreev-reflection measurements in RuSr2GdCu2O8 (Articolo in rivista)

Type

Label

Anno

Alternative label

Calzolari A., Daghero D., Gonnelli R.S., Ummarino G.A., Stepanov V.A., Masini R., Cimberle M.R., Ferretti M. (2006)
Andreev-reflection measurements in RuSr2GdCu2O8
in Journal of physics and chemistry of solids
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Calzolari A., Daghero D., Gonnelli R.S., Ummarino G.A., Stepanov V.A., Masini R., Cimberle M.R., Ferretti M. (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Politecn Turin, INFM, Dipartimento Fis, I-10129 Turin, Italy; INFM, LAMIA, I-16152 Genoa, Italy; Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia; CNR, IMEM, Sez Genova, I-16146 Genoa, Italy; Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy (literal)

Titolo

Abstract

We performed point-contact spectroscopy (PCS) measurements in polycrystalline RuSr2GdCu2O8 samples. The best conductance curves were obtained by using a metallic tip (Pt-Ir) pressed against the sample surface. The low-temperature conductance curves feature a zero-bias peak, suggestive of Andreev reflection at the interface between a normal metal and a d-wave superconductor. These curves can be easily fitted, in the framework of the generalized BTK model, by using pure d-wave symmetry. We were able to obtain the whole temperature dependence of the conductance curves from 4.2 K up to the critical temperature of the junction. The gap amplitude given by the fit presents an anomalous positive curvature in the whole temperature range. (c) 2005 Elsevier Ltd. All rights reserved. (literal)

Prodotto di

Autore CNR

Insieme di parole chiave

Autore CNR di

Prodotto

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

Insieme di parole chiave di

data.CNR.it