LDA+DMFT spectral functions and effective electron mass enhancement in the superconductor LaFePO
S. L. Skornyakov, N. A. Skorikov, A. V. Lukoyanov, A. O. Shorikov, V. I. Anisimov
DOI 10.1103/PhysRevB.81.174522 · Physical Review B
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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 [D. H. Lu et al., Nature (London) 455, 81 (2008)]. Obtained effective electron mass enhancement values m∗/m≈1.9−2.2 are in good agreement with infrared and optical studies [M. M. Qazilbash et al., Nat. Phys. 5, 647 (2009)], 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFePO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | unknown |
| RO1-xFxFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| Sr1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
| K0.45Ba0.55Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| LaO0.9F0.1FeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
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