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Title: LDA+DMFT Spectral Functions and Effective Electron Mass Enhancement in the Superconductor LaFePO
Authors: Skornyakov, S. L.
Skorikov, N. A.
Lukoyanov, A. V.
Shorikov, A. O.
Anisimov, V. I.
Issue Date: 2010
Publisher: American Physical Society (APS)
Citation: LDA+DMFT Spectral Functions and Effective Electron Mass Enhancement in the Superconductor LaFePO / S. L. Skornyakov, N. A. Skorikov, A. V. Lukoyanov et al. // Physical Review B - Condensed Matter and Materials Physics. — 2010. — Vol. 81. — Iss. 17. — 174522.
Abstract: In this paper we report LDA+DMFT results (method combining local-density approximation with dynamical mean-field theory) for spectral properties of superconductor LaFePO. Calculated k -resolved spectral functions reproduce recent angle-resolved photoemission spectroscopy data. Obtained effective electron mass enhancement values m/≈1.9-2.2 are in good agreement with infrared and optical studies, de Haas-van Alphen, electrical resistivity, and electronic specific-heat measurements results that unambiguously evidence for moderate correlations strength in LaFePO. Similar values of m /m were found in the other Fe-based superconductors with substantially different superconducting transition temperatures. Thus, the dynamical correlation effects are essential in the Fe-based superconductors, but the strength of electronic correlations does not determine the value of superconducting transition temperature. © 2010 The American Physical Society.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 77955441405
ISSN: 1098-0121
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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