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Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

Authors
Ganin, A. Y.
Rozbicki, E.
Bacsa, J.
Meevasana, W.
King, P. D. C.
Caffio, M.
Schaub, R.
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Published in Physical Review Letters. 2010, vol. 104, no. 09, p. 097002
Abstract We investigate the normal state of the “11” iron-based superconductor FeSe0.42Te0.58 by angle-resolved photoemission. Our data reveal a highly renormalized quasiparticle dispersion characteristic of a strongly correlated metal. We find sheet dependent effective carrier masses between ≈3 and 16me corresponding to a mass enhancement over band structure values of m∗/mband≈6–20. This is nearly an order of magnitude higher than the renormalization reported previously for iron-arsenide superconductors of the “1111” and “122” families but fully consistent with the bulk specific heat.
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TAMAI, Anna et al. Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy. In: Physical Review Letters, 2010, vol. 104, n° 09, p. 097002. https://archive-ouverte.unige.ch/unige:42072

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Deposited on : 2014-11-21

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