Strong electron correlations in the normal state of FeSe0.42Te0.58

Tamai, A, Ganin, AY, Rozbicki, E, Bacsa, J, Meevasana, W, King, PDC, Caffio, M, Schaub, R, Margadonna, S, Prassides, K
et al (show 2 more authors) (2009) Strong electron correlations in the normal state of FeSe0.42Te0.58. Phys. Rev. Lett., 104 (9). 097002-.

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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 - 16 m_e corresponding to a mass enhancement over band structure values of m*/m_band ~ 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.

Item Type: Article
Additional Information: 5 pages, 4 figures, to appear in Phys. Rev. Lett
Uncontrolled Keywords: cond-mat.str-el, cond-mat.str-el
Depositing User: Symplectic Admin
Date Deposited: 01 Aug 2016 16:13
Last Modified: 19 Jan 2023 07:32
DOI: 10.1103/physrevlett.104.097002
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