SABER UCV >
1) Investigación >
Artículos Publicados >

Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/123456789/6568

Título : Unusual behaviours and impurity effects in the noncentrosymmetric superconductor CePt3Si
Autor : Bonalde, I
Ribeiro, R L
Bramer-Escamilla, W
Rojas, C.
Bauer, E
Prokofiev, A
Haga, Y
Yasuda, T
Onuki, Y
Palabras clave : CePt3Si
Superconductivity
Fecha de publicación : 2009
Editorial : IOP Publishing Ltd
Citación : New Journal of Physics 11 (2009) 055054
Citación : New Journal of Physics;11
Resumen : We report a study in which the effect of defects/impurities, growth process, off-stoichiometry and presence of impurity phases on the superconducting properties of noncentrosymmetric CePt3Si is analysed by means of the temperature dependence of the magnetic penetration depth. We found that the linear low-temperature response of the penetration depth—indicative of line nodes in this material—is robust regarding sample quality, in contrast to what is observed in unconventional centrosymmetric superconductors with line nodes. We discuss evidence suggesting that the broadness of the superconducting transition may be intrinsic, though not implying the existence of a second superconducting transition. The superconducting transition temperature systematically occurs at about 0.75K in our measurements, in agreement with resistivity and ac magnetic susceptibility data but in conflict with specific heat,thermal conductivity and NMR data in which Tc is about 0.5 K. Random defects do not change the linear low-temperature dependence of the penetration depth in the heavy-fermion CePt3Si with line nodes, as they do in unconventional centrosymmetric superconductors with line nodes.
URI : http://saber.ucv.ve/jspui/handle/123456789/6568
ISSN : 1367-2630
Aparece en las colecciones: Artículos Publicados

Ficheros en este ítem:

Fichero Descripción Tamaño Formato
NJP.pdf1.28 MBAdobe PDFVisualizar/Abrir

Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2008 MIT and Hewlett-Packard - Comentarios