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- W1570996202 abstract "Obtaining the electronic structure of the newly discovered iron-based superconductors is the key to understanding the mechanism of their high-temperature superconductivity. We used angle-resolved photoemission spectroscopy (ARPES) to make direct measurements of the electronic structure and Fermi surface (FS) of the untwinned uniaxial state of CaFe2As2, the parent compound of iron-based superconductors. We observed unequal dispersions and FS geometries along the orthogonal Fe-Fe bond directions. More importantly, unidirectional straight and flat FS segments are observed near the zone center, which indicates the existence of a unidirectional nematic charge density wave order, strengthening the case for a quantum electronic liquid crystalline nematic phase. Further, the doping dependence extrapolates to a possible quantum critical point of the disappearance of this order in the heavily overdoped regime of these materials." @default.
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- W1570996202 date "2010-09-01" @default.
- W1570996202 modified "2023-10-16" @default.
- W1570996202 title "Uniaxial nematic-like electronic structure and Fermi surface of untwinned CaFe2As2" @default.
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- W1570996202 doi "https://doi.org/10.48550/arxiv.1009.0271" @default.
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