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Optical properties of AFe(2)As(2) (A=Ca, Sr, and Ba) single crystals

TitleOptical properties of AFe(2)As(2) (A=Ca, Sr, and Ba) single crystals
Publication TypeJournal Article
Year of Publication2016
AuthorsDai, YM, Akrap, A, Bud'ko, SL, Canfield, PC, Homes, CC
JournalPhysical Review B
Volume94
Pagination195142
Date Published11
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000388466000002
Keywordsbafe2as2, chalcogenides, charge dynamics, high-temperature superconductivity, iron pnictides, physics, state
Abstract

TN may be related to the Dirac conelike dispersion of the electronic bands. Below T-N new features emerge in the optical conductivity that are associated with the reconstruction Fermi surface and the gapping of bands at Delta(1) similar or equal to 45-80 meV, and Delta(2) similar or equal to 110-210 meV. The reduction in the spectral weight associated with the free carriers is captured by the gap structure; specifically, the spectral weight from the narrow Drude term appears to be transferred into the low-energy gap feature, while the missing weight from the broad term shifts to the high-energy gap.

DOI10.1103/PhysRevB.94.195142
Custom 1

Complex States

Alternate JournalPhys. Rev. B