2011/01/31 by Vivek Mishra, V. Mishra, S. Graser +2
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Condensed matter physics #Corporate Taxation and Avoidance #Fermi Gamma-ray Space Telescope #Fermi level #Fermi surface #Iron-based superconductors research #London penetration depth #Materials science #Penetration depth #Physics #Pnictogen #Quantum mechanics #Superconductivity #Superfluidity #Thermal conductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.84.014524
published as Phys. Rev. B 84, 014524 (2011) · 15 pages, 10 Figures
openalex publication_date 2011/07/28 · arxiv created 2011/07/29 · arxiv updated 2015/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The Fermi surfaces of Fe-pnictide superconductors are fairly two-dimensional, and it has thus come as a surprise that recent penetration depth and thermal conductivity measurements on systems of the 122 type have reported c-axis transport coefficients at low temperatures in the superconducting state comparable to or even larger than that in the ab plane. These results should provide important information on both the Fermi surface and the superconducting state. Here we consider the theory of the superfluid density and thermal conductivity in models of extended s-wave superconducting states expected to be appropriate for Fe-pnictide systems. We include intraband disorder and consider a range of different Fermi surfaces where gap nodes might exist. We show that recent experiments on Ba(Fe_1\ensuremath-xCox)2As2 can be understood semiquantitatively with such an approach, and we discuss their implications.