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-. ISSN 0031-9007, 1079-7114

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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 ~ 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: 21 Apr 2026 23:18
DOI: 10.1103/physrevlett.104.097002
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3002648
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