Electronic structure of Fe1.04Te0.66Se0.34 - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: We report the electronic structure of the iron-chalcogenide superconductor,Fe1.04Te0.66Se0.34, obtained with high resolution angle-resolvedphotoemission spectroscopy and density functional calculations. Inphotoemission measurements, various photon energies and polarizations areexploited to study the Fermi surface topology and symmetry properties of thebands. The measured band structure and their symmetry characters qualitativelyagree with our density function theory calculations of FeTe0.66Se0.34,although the band structure is renormalized by about a factor of three. We findthat the electronic structures of this iron-chalcogenides and theiron-pnictides have many aspects in common, however, significant differencesexist near the Gamma-point. For Fe1.04Te0.66Se0.34, there are clearlyseparated three bands with distinct even or odd symmetry that cross the Fermienergy EF near the zone center, which contribute to three hole-like Fermisurfaces. Especially, both experiments and calculations show a hole-likeelliptical Fermi surface at the zone center. Moreover, no sign of spin densitywave was observed in the electronic structure and susceptibility measurementsof this compound.



Autor: Fei Chen, Bo Zhou, Yan Zhang, Jia Wei, Hong-Wei Ou, Jia-Feng Zhao, Cheng He, Qing-Qin Ge, Masashi Arita, Kenya Shimada, Hirofumi

Fuente: https://arxiv.org/



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