84 citations · 328 across the 16 of their papers we have counts for
16 papers
Practically universal representation of the Helfand-Werthamer upper critical field for any transport scattering rate
Ruslan Prozorov, Vladimir G. Kogan
The simplified scaling of the orbital upper critical field, , for the isotropic case is discussed. To facilitate the analysis of the experimental data, we suggest a simp…
Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters
V. G. Kogan, R. Prozorov
We study the effects of anisotropic order parameters on the temperature dependence of London penetration depth anisotropy . After MgB, this dependence is commonly attri…
On temperature-dependent anisotropies of upper critical field and London penetration depth
V. G. Kogan, R. Prozorov, A. E. Koshelev
We show on a few examples of one-band materials with spheroidal Fermi surfaces and anisotropic order parameters that anisotropies of the upper critical field and of the…
Anisotropic type-I superconductivity and anomalous superfluid density in OsB 2
Jonas Bekaert, Stephan Vercauteren, Alexandros Aperis +4
We present a microscopic study of superconductivity in OsB2 , and discuss the origin and characteristic length scales of the superconducting state. From first-principles we show th…
Changing the type of superconductivity by magnetic and potential scattering
V. G. Kogan, R. Prozorov
By evaluating the upper and thermodynamic critical fields, and , and their ratio at arbitrary temperatures, we argue that situations are possible when a…
Anisotropic criteria for the type of superconductivity
V. G. Kogan, R. Prozorov
The classical criterion for classification of superconductors as type-I or type-II based on the isotropic Ginzburg-Landau theory is generalized to arbitrary temperatures for materi…
Effect of equatorial line nodes on upper critical field and London penetration depth
V. G. Kogan, R. Prozorov
The upper critical field and its anisotropy are calculated for order parameters with line nodes at equators, , of the Fermi surface of uniaxial superconductors. It…
London Penetration Depth and Pair Breaking
V. G. Kogan, R. Prozorov, V. Mishra
The London penetration depth is evaluated for isotropic materials for any transport and pair-breaking Born scattering rates. Besides known results, a number of new features are fou…
Rutgers relation for the analysis of superfluid density in superconductors
H. Kim, V. G. Kogan, K. Cho +2
It is shown that the thermodynamic Rutgers relation for the second order phase transitions can be used for the analysis of the superfluid density data irrespective of complexities…
Orbital upper critical field of type-II superconductors with pair breaking
V. G. Kogan, R. Prozorov
The orbital upper critical field is evaluated for isotropic materials with arbitrary transport and pair-breaking scattering rates. It is shown that unlike transport scatt…
Nodal superconductivity in isovalently substituted SrFe(AsP) pnictide superconductor at the optimal doping, 0.35
J. Murphy, C. P. Strehlow, K. Cho +7
Temperature-dependent London penetration depth, , was measured in optimally - doped, 0.35, as-grown (25 K, RRR==4.5) and annealed ($T_c \appr…
Reply to "Comment on \emph{"Precision global measurements of London penetration depth in Fe(TeSe)"}"
K. Cho, H. Kim, M. A. Tanatar +1
We reply to the Comment by T. Klein, P. Rodière and C. Marcenat (arXiv:1205.2566), on our paper, "Precision global measurements of London penetration depth in FeTeSe$_{0.4…
Orbital upper critical field and its anisotropy of clean one- and two-band superconductors
V. G. Kogan, R. Prozorov
The Helfand-Werthamer (HW) scheme\cite{HW} of evaluating the orbital upper critical field is generalized to anisotropic superconductors in general, and to two-band clean materials,…
Anomalous Meissner effect in pnictide superconductors
R. Prozorov, M. A. Tanatar, Bing Shen +4
The Meissner effect has been studied in Ba(Fe0.926Co0.074)2As2 and Ba0.6K0.4Fe2As2 single crystals and compared to well known, type-II superconductors LuNi2B2C and V3Si. Whereas fl…
London penetration depth and strong pair-breaking in iron-based superconductors
R. T. Gordon, H. Kim, M. A. Tanatar +2
The low temperature variation of the London penetration depth for a number of iron-pnictide and iron-chalcogenide superconductors is nearly quadratic, with $n\approx…
Unusual temperature dependence of the London penetration depth in all-organic β``-(ET)_2SF_5CH_2CF_2SO_3 single crystals
R. Prozorov, R. W. Giannetta, J. Schlueter +4
The temperature dependence of the in-plane, λ_{\parallel}, and interplane, λ_{\perp}, London penetration depth was measured in the metal-free all-organic superconductor β-ET (see t…