Cyclotron resonance and mass enhancement by electron correlation in KFe2As2.
Phys Rev Lett
; 107(16): 166402, 2011 Oct 14.
Article
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| MEDLINE
| ID: mdl-22107409
ABSTRACT
Cyclotron resonance (CR) measurements for the Fe-based superconductor KFe(2)As(2) are performed. One signal for CR is observed, and is attributed to the two-dimensional α Fermi surface at the Γ point. We found a large discrepancy in the effective masses of CR [(3.4±0.05)m(e) (m(e) is the free-electron mass)] and de Haas-van Alphen results, a direct evidence of mass enhancement due to electronic correlation. A comparison of the CR and de Haas-van Alphen results shows that both intra- and interband electronic correlations contribute to the mass enhancement in KFe(2)As(2).
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01-internacional
Base de datos:
MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2011
Tipo del documento:
Article
País de afiliación:
Japón