Electronic vortex structure of Fe-based superconductors: Application to LiFeAs

B. Mencia Uranga, Maria N. Gastiasoro, Brian M. Andersen

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Abstract

Detailed tunneling spectroscopy of vortex core states can provide important insight to the momentum structure of the superconducting order parameter. We present a theoretical study of vortex bound states in iron-based superconductors by use of a realistic five-band model relevant to these systems, and superconductivity stabilized by spin-fluctuation-generated pairing vertices yielding an s± gap structure. The computed local density of states agrees remarkably well with both the bias dependence of the local conductance and the spatial structure of the low-bias conductance as obtained by scanning tunneling microscopy measurements on LiFeAs [T. Hanaguri, Phys. Rev. B 85, 214505 (2012)PRBMDO1098-012110.1103/PhysRevB.85.214505].

Original languageEnglish (US)
Article number224503
JournalPhysical Review B
Volume93
Issue number22
DOIs
StatePublished - Jun 2 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

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