Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors

Prozorov, R.; Cho, K.; Kim, H.; Tanatar, M. A.

doi:10.1088/1742-6596/449/1/012020

Title: Dome – like variation of the superconducting gap anisotropy in Fe-based superconductors

Journal Article · Wed Jul 17 00:00:00 EDT 2013 · Journal of Physics. Conference Series (Online)

DOI:https://doi.org/10.1088/1742-6596/449/1/012020· OSTI ID:1127462

Prozorov, R. ^[1]; Cho, K. ^[1]; Kim, H. ^[1]; Tanatar, M. A. ^[1]

Ames Laboratory (AMES), Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature - dependent London penetration depth provide important information on the structure of the superconducting gap. We show that despite significant differences between different iron - based superconductors, there is a universal trend: the gap is least anisotropic at the optimal doping and its anisotropy increases upon the departure towards underdoped and overdoped ends of the ''superconducting dome''. As a result, this trend is not related to the presence of the long-range magnetic order in the underdoped state.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1127462

Journal Information:: Journal of Physics. Conference Series (Online), Vol. 449; ISSN 1742-6596

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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