Unconventional London Penetration Depth in Single-CrystalBa(Fe0.93Co0.07)2As2Superconductors

Single Vortex Pinning and Penetration Depth in Superconducting NdFeAsO1-xFx

Single-vortex pinning and penetration depth in superconducting NdFeAsO[subscript 1x]F[subscript x]. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We use a magnet...

Direct measurement of the London penetration depth in YBa2Cu3O6.92 using low-energy μSR

R. F. Kiefl, 2, 3 M. D. Hossain, 2 B. M. Wojek, 5 S. R. Dunsiger, G. D. Morris, T. Prokscha, Z. Salman, J. Baglo, D. A. Bonn, 3 R. Liang, 3 W. N. Hardy, 3 A. Suter, and E. Morenzoni Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1 TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada, V6T 2A3 Canadian Institute for Advanced Research, Canada Paul Sch...

Singularity of the London penetration depth at quantum critical points in superconductors.

We present a general theory of the singularity in the London penetration depth at symmetry-breaking and topological quantum critical points within a superconducting phase. While the critical exponents and ratios of amplitudes on the two sides of the transition are universal, an overall sign depends upon the interplay between the critical theory and the underlying Fermi surface. We determine the...

Comment on ”Precision global measurements of London penetration depth in FeTe0.58Se0.42”

Agreement between local and global measurements of the London penetration depth

Recent measurements of the superconducting penetration depth in Ba(Fe1 xCox)2As2 appeared to disagree on the magnitude and curvature of Dkab(T), even near optimal doping. These measurements were carried out on different samples grown by different groups. To understand the discrepancy, we use scanning SQUID susceptometry and a tunnel diode resonator to measure the penetration depth in a single s...