Observation of intertwined Fermi surface topology, orbital parity symmetries and electronic interactions in iron arsenide superconductors - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Observation of intertwined Fermi surface topology, orbital parity symmetries and electronic interactions in iron arsenide superconductors - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present a polarization and topology resolved study of the low energy bandstructure in optimally doped superconducting Ba0.6K0.4Fe2As2 using angleresolved photoemission spectroscopy. Polarization-contrasted measurements allowus to identify and trace all low energy bands expected in models, revealingunexpected symmetry breaking and a surprisingly intertwined Fermi surfacetopology of hole-like bands near the Brillouin zone center. Band structurecorrelations across the Gamma-M spin fluctuation wavevector are compared withthe superconducting gap anisotropy which suggest a partial scenario forspin-mediated interband instability contributing to superconductivity in thehole doped regime.



Author: L.A. Wray, D. Hsieh, Y. Xia, S.-Y. Xu, D. Qian, G. F. Chen, J. L. Luo, N. L. Wang, M.Z. Hasan

Source: https://arxiv.org/



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