Linear Temperature Dependence of the Lower Critical Field $H_{c1}$ in F-Doped LaOFeAs Superconductors

Simple item page
dc.creatorRen, Cong
dc.creatorWang, Zhao-Sheng
dc.creatorYang, Huan
dc.creatorZhu, Xiyu
dc.creatorFang, Lei
dc.creatorMu, Gang
dc.creatorShan, Lei
dc.creatorWen, Hai-Hu
dc.date2008-04-10
dc.date.accessioned2026-07-07T09:31:34Z
dc.date.available2026-07-07T09:31:34Z
dc.descriptionWe present the first experimental results of the lower critical field $H_{c1}$ of the newly discovered F-doped superconductor LaO$_{0.9}$F$_{0.1}$FeAs (F-LaOFeAs) by global and local magnetization measurements. It is found that $H_{c1}$ showed an clear linear-$T$ dependence down to a temperature of 2 K, indicative of an unconventional pairing symmetry with a nodal gap function. Based on the d-wave model, we estimated a maximum gap value $Δ_0=4.0 \pm 0.6$ meV, in consistent with the recent specific heat and point-contact tunneling measurements. Taking the demagnetization factor into account, the absolute value of $H_{c1}(0)$ is determined to be about 54 Oe, manifesting a low superfluid density for LaO$_{0.9}$F$_{0.1}$FeAs.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0804.1726
dc.identifierhttp://arxiv.org/abs/0804.1726
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158506
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleLinear Temperature Dependence of the Lower Critical Field $H_{c1}$ in F-Doped LaOFeAs Superconductors
dc.typetext

Files

Collections

arXiv