Reply to "Comment on 'Precision global measurements of London penetration depth in FeTe0.58Se0.42'"

TitleReply to "Comment on 'Precision global measurements of London penetration depth in FeTe0.58Se0.42'"
Publication TypeJournal Article
Year of Publication2012
AuthorsCho K, Kim H, Tanatar MA, Prozorov R
Journal TitlePhysical Review B
Volume86
Pages066502
Date Published08
Type of ArticleEditorial Material
ISBN Number1098-0121
Accession NumberWOS:000307719800005
Keywordssuperconductors
Abstract

We reply to the Comment by Klein, Rodi` ere, and Marcenat [Phys. Rev. B 86, 066501 (2012)] on our paper [Phys. Rev. B 84, 174502 (2011)]. Our work was motivated by Klein et al. [Phys. Rev. B 82, 184506 (2010)]. In their paper, Klein et al. have attributed a factor of 5 difference in the value of the London penetration depth obtained from their tunnel diode resonator (TDR) measurements and calculated from the "field of first penetration" to the surface roughness, although they have not verified it experimentally. In our paper, we have studied the effects of deliberately introduced surface roughness and found that its effects are minor and cannot be responsible for the difference of such magnitude. Instead, we suggest that the value of the field of first penetration measured with Hall arrays cannot be used to extract a true lower critical field due to several reasons outlined in our Reply. We emphasize that the accuracy of the calibration procedure of the TDR technique has been carefully verified in several prior studies and our work on FeTe0.58Se0.42 further confirms it. We show that in their Comment, Klein et al. use wrong arguments of the universal behavior of the superfluid density in the gapless limit, because it is inapplicable for the multiband superconductors. We also discuss the applicability of the clean-limit. model and the influence of the disorder on the obtained results.

URL<Go to ISI>://WOS:000307719800005
DOI10.1103/PhysRevB.86.066502
Alternate JournalPhys. Rev. B