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 ≈3and16me 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.
Original language | English |
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Article number | 097002 |
Journal | Physical review letters |
Volume | 104 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2010 Mar 4 |
ASJC Scopus subject areas
- Physics and Astronomy(all)