Strong electron correlations in the normal state of the iron-based FeSe0.42Te0.58 superconductor observed by angle-resolved photoemission spectroscopy

A. Tamai; A. Y. Ganin; E. Rozbicki; J. Bacsa; W. Meevasana; P. D.C. King; M. Caffio; R. Schaub; S. Margadonna; K. Prassides; M. J. Rosseinsky; F. Baumberger

doi:10.1103/PhysRevLett.104.097002

Strong electron correlations in the normal state of the iron-based FeSe0.42Te0.58 superconductor observed by angle-resolved photoemission spectroscopy

A. Tamai, A. Y. Ganin, E. Rozbicki, J. Bacsa, W. Meevasana, P. D.C. King, M. Caffio, R. Schaub, S. Margadonna, K. Prassides, M. J. Rosseinsky, F. Baumberger

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

170 Citations (Scopus)

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
Article number	097002
Journal	Physical review letters
Volume	104
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.104.097002
Publication status	Published - 2010 Mar 4

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.104.097002

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Tamai, A., Ganin, A. Y., Rozbicki, E., Bacsa, J., Meevasana, W., King, P. D. C., Caffio, M., Schaub, R., Margadonna, S., Prassides, K., Rosseinsky, M. J., & Baumberger, F. (2010). Strong electron correlations in the normal state of the iron-based FeSe0.42Te0.58 superconductor observed by angle-resolved photoemission spectroscopy. Physical review letters, 104(9), [097002]. https://doi.org/10.1103/PhysRevLett.104.097002

Strong electron correlations in the normal state of the iron-based FeSe0.42Te0.58 superconductor observed by angle-resolved photoemission spectroscopy. / Tamai, A.; Ganin, A. Y.; Rozbicki, E.; Bacsa, J.; Meevasana, W.; King, P. D.C.; Caffio, M.; Schaub, R.; Margadonna, S.; Prassides, K.; Rosseinsky, M. J.; Baumberger, F.

In: Physical review letters, Vol. 104, No. 9, 097002, 04.03.2010.

Research output: Contribution to journal › Article › peer-review

Tamai, A, Ganin, AY, Rozbicki, E, Bacsa, J, Meevasana, W, King, PDC, Caffio, M, Schaub, R, Margadonna, S, Prassides, K, Rosseinsky, MJ & Baumberger, F 2010, 'Strong electron correlations in the normal state of the iron-based FeSe0.42Te0.58 superconductor observed by angle-resolved photoemission spectroscopy', Physical review letters, vol. 104, no. 9, 097002. https://doi.org/10.1103/PhysRevLett.104.097002

Tamai, A. ; Ganin, A. Y. ; Rozbicki, E. ; Bacsa, J. ; Meevasana, W. ; King, P. D.C. ; Caffio, M. ; Schaub, R. ; Margadonna, S. ; Prassides, K. ; Rosseinsky, M. J. ; Baumberger, F. / 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, No. 9.

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