Magnetic penetration depth in disordered iron-based superconductors

M. Dzero, M. Khodas, A. D. Klironomos, M. G. Vavilov, A. Levchenko

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Abstract

We study the effect of disorder on the London penetration depth in iron-based superconductors. The theory is based on a two-band model with quasi-two-dimensional Fermi surfaces, which allows for the coexistence region in the phase diagram between magnetic and superconducting states in the presence of intraband and interband scattering. Within the quasiclassical approximation we derive and solve Eilenberger's equations, which include a weak external magnetic field, and provide analytical expressions for the penetration depth in the various limiting cases. A complete numerical analysis of the doping and temperature dependence of the London penetration depth reveals the crucial effect of disorder scattering, which is especially pronounced in the coexistence phase. The experimental implications of our results are discussed.

Original languageAmerican English
Article number144501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number14
DOIs
StatePublished - 5 Oct 2015

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society. ©2015 American Physical Society.

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