HAL: hal-00625580, version 1

arXiv: 1109.5479

DOI: 10.1016/j.physb.2012.01.021

Detailed view

Export this paper BibTeX - EndNote - TEI - RefWorks -

ECRYS 2011 - International School and Workshop on Electronic Crystals, Cargèse : France (2011)

Vortex pinning : a probe for nanoscale disorder in iron-based superconductors

Cornelis Jacominus Van Der Beek 1, Sultan Demirdis 1, Marcin Konczykowski 1, Yanina Fasano 2, Nestor René Cejas-Bolecek 2, H. Pastoriza 2, Dorothée Colson 3, F. Rullier-Albenque 3

(2011-12-30)

The pinning of quantized flux lines, or vortices, in the mixed state is used to quantify the effect of impurities in iron-based superconductors (IBS). Disorder at two length scales is relevant in these materials. Strong flux pinning resulting from nm-scale heterogeneity of the superconducting properties leads to the very disordered vortex ensembles observed in the IBS, and to the pronounced maximum in the critical current density jc at low magnetic fields. Disorder at the atomic scale, most likely induced by the dopant atoms, leads to "weak collective pinning" and a magnetic field-independent contribution jcoll. The latter allows one to estimate quasi-particle scattering rates.

1:	Laboratoire des Solides Irradiés (LSI)
	CNRS : UMR7642 – Polytechnique - X – CEA : DSM/IRAMIS
2:	Laboratorio de Bajas Temperaturas (LBT)
	Consejo Nacional de Investigaciones Científicas y Técnicas.
3:	Service de physique de l'état condensé (SPEC)
	CNRS : URA2464 – CEA : DSM/IRAMIS

Subject

:

Physics/Condensed Matter/Superconductivity

Keyword(s): Iron-based superconductors – heterogeneity – vortex lattice – flux pinning – critical current – scattering

hal-00625580, version 1

http://hal.archives-ouvertes.fr/hal-00625580

oai:hal.archives-ouvertes.fr:hal-00625580

From: Cornelis Jacominus Van Der Beek <>

Submitted on: Thursday, 22 September 2011 08:55:09

Updated on: Wednesday, 18 January 2012 16:08:11