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- W2078308940 abstract "Angle resolved photoemission (ARPES) data from the electron doped cuprate superconductor Sm$_{1.86}$Ce$_{0.14}$CuO$_4$ shows a much stronger pseudo-gap or hot-spot effect than that observed in other optimally doped $n$-type cuprates. Importantly, these effects are strong enough to drive the zone-diagonal states below the chemical potential, implying that d-wave superconductivity in this compound would be of a novel nodeless gap variety. The gross features of the Fermi surface topology and low energy electronic structure are found to be well described by reconstruction of bands by a $sqrt{2}timessqrt{2}$ order. Comparison of the ARPES and optical data from the $same$ sample shows that the pseudo-gap energy observed in optical data is consistent with the inter-band transition energy of the model, allowing us to have a unified picture of pseudo-gap effects. However, the high energy electronic structure is found to be inconsistent with such a scenario. We show that a number of these model inconsistencies can be resolved by considering a short range ordering or inhomogeneous state." @default.
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- W2078308940 date "2007-02-01" @default.
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- W2078308940 title "Electronic structure of electron-doped<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi mathvariant=normal>Sm</mml:mi><mml:mn>1.86</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>Ce</mml:mi><mml:mn>0.14</mml:mn></mml:msub><mml:mi mathvariant=normal>Cu</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>: Strong pseudogap effects, nodeless gap, and signatures of short-range …" @default.
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- W2078308940 doi "https://doi.org/10.1103/physrevb.75.060501" @default.
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