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

School of Chemistry

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Abstract / Description of output

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 approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 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
Pages (from-to)	-
Number of pages	4
Journal	Physical Review Letters
Volume	104
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.104.097002
Publication status	Published - 5 Mar 2010

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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), -. Article 097002. https://doi.org/10.1103/PhysRevLett.104.097002

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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 approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 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, 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, pp. -. https://doi.org/10.1103/PhysRevLett.104.097002

TY - JOUR

T1 - Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

AU - Tamai, A.

AU - Ganin, A. Y.

AU - Rozbicki, E.

AU - Bacsa, J.

AU - Meevasana, W.

AU - King, P. D. C.

AU - Caffio, M.

AU - Schaub, R.

AU - Margadonna, S.

AU - Prassides, K.

AU - Rosseinsky, M. J.

AU - Baumberger, F.

PY - 2010/3/5

Y1 - 2010/3/5

N2 - 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 approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 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.

AB - 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 approximate to 3 and 16m(e) corresponding to a mass enhancement over band structure values of m*/m(band) approximate to 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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U2 - 10.1103/PhysRevLett.104.097002

DO - 10.1103/PhysRevLett.104.097002

M3 - Article

SN - 0031-9007

VL - 104

SP - -

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 097002

ER -

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

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