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

Anna Tamai; A. Y. Ganin; Emil Jerzy Rozbicki; J. Bacsa; Worawat Meevasana; Phil King; Marco Caffio; Renald Schaub; S. Margadonna; K. Prassides; M. J. Rosseinsky; Felix Baumberger

doi:10.1103/PhysRevLett.104.097002

Strong Electron Correlations in the Normal State of the Iron-Based FeSe_0.42Te_0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

Anna Tamai, A. Y. Ganin, Emil Jerzy Rozbicki, J. Bacsa, Worawat Meevasana, Phil King, Marco Caffio, Renald Schaub, S. Margadonna, K. Prassides, M. J. Rosseinsky, Felix Baumberger

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

Abstract

We investigate the normal state of the "11'' iron-based superconductor FeSe_0.42Te_0.58 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
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 - Mar 2010

Keywords

PNICTIDES
ARPES
STM

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10.1103/PhysRevLett.104.097002

Cite this

Tamai, A., Ganin, A. Y., Rozbicki, E. J., Bacsa, J., Meevasana, W., King, P., 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 FeSe_0.42Te_0.58 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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title = "Strong Electron Correlations in the Normal State of the Iron-Based FeSe0.42Te0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy",

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 16me corresponding to a mass enhancement over band structure values of m*/mband 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.",

keywords = "PNICTIDES, ARPES, STM",

author = "Anna Tamai and Ganin, {A. Y.} and Rozbicki, {Emil Jerzy} and J. Bacsa and Worawat Meevasana and Phil King and Marco Caffio and Renald Schaub and S. Margadonna and K. Prassides and Rosseinsky, {M. J.} and Felix Baumberger",

year = "2010",

month = mar,

doi = "10.1103/PhysRevLett.104.097002",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "9",

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Tamai, A, Ganin, AY, Rozbicki, EJ, Bacsa, J, Meevasana, W, King, P, Caffio, M, Schaub, R, Margadonna, S, Prassides, K, Rosseinsky, MJ & Baumberger, F 2010, 'Strong Electron Correlations in the Normal State of the Iron-Based FeSe_0.42Te_0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy', Physical Review Letters, vol. 104, no. 9, 097002. 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, Anna

AU - Ganin, A. Y.

AU - Rozbicki, Emil Jerzy

AU - Bacsa, J.

AU - Meevasana, Worawat

AU - King, Phil

AU - Caffio, Marco

AU - Schaub, Renald

AU - Margadonna, S.

AU - Prassides, K.

AU - Rosseinsky, M. J.

AU - Baumberger, Felix

PY - 2010/3

Y1 - 2010/3

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 16me corresponding to a mass enhancement over band structure values of m*/mband 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 16me corresponding to a mass enhancement over band structure values of m*/mband 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.

KW - PNICTIDES

KW - ARPES

KW - STM

UR - http://link.aps.org/doi/10.1103/PhysRevLett.104.097002

U2 - 10.1103/PhysRevLett.104.097002

DO - 10.1103/PhysRevLett.104.097002

M3 - Article

SN - 0031-9007

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 097002

ER -

Strong Electron Correlations in the Normal State of the Iron-Based FeSe_0.42Te_0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy

Abstract

Keywords

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Laser-ARPES: Laser based photoelectron spectroscopy for a closer look at correlated electrons

EP/F006640/1 Probing the Quantum: Probing the quantum many-body states of low-dimensional metals by angular resolved photoelectron spectroscopy

SFC SRDG Centre SCISS: INTERDISCIPLINARY SCOTTISH CENTRE FOR SURFACE SPECTROSCOPY

Cite this

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Laser-ARPES: Laser based photoelectron spectroscopy for a closer look at correlated electrons

EP/F006640/1 Probing the Quantum: Probing the quantum many-body states of low-dimensional metals by angular resolved photoelectron spectroscopy

SFC SRDG Centre SCISS: INTERDISCIPLINARY SCOTTISH CENTRE FOR SURFACE SPECTROSCOPY

Cite this

Strong Electron Correlations in the Normal State of the Iron-Based FeSe_0.42Te_0.58 Superconductor Observed by Angle-Resolved Photoemission Spectroscopy