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Cyclotron Resonance and Mass Enhancement by Electron Correlation inKFe2As2

Motoi Kimata, Taichi Terashima, Nobuyuki Kurita, Hidetaka Satsukawa, Atsushi Harada, Kouta Kodama, Kanji Takehana, Yasutaka Imanaka, Tadashi Takamasu, Kunihiro Kihou, Chul-Ho Lee, Hijiri Kito (+6 others)
2011 Physical Review Letters  

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2011 pre-print arXiv:1111.1884v1 fatcat:i4zvuifsrffy3lvsehxtomfaqy
Cyclotron resonance (CR) measurements for the Fe-based superconductor KFe_2As_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 (dHvA) results, a direct evidence of mass enhancement due to electronic correlation. A comparison of the CR and dHvA results shows that both intra- and interband
more » ... c correlations contribute to the mass enhancement in KFe_2As_2.
doi:10.1103/physrevlett.107.166402 pmid:22107409 fatcat:a77xeu2bgbf7heuj4krgzczk4m
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Motoi Kimata, Taichi Terashima, Nobuyuki Kurita, Hidetaka Satsukawa, Atsushi Harada, Kouta Kodama, Kanji Takehana, Yasutaka Imanaka, Tadashi Takamasu, Kunihiro Kihou, Chul-Ho Lee, Hijiri Kito, Hiroshi Eisaki, Akira Iyo, Hideto Fukazawa, Yoh Kohori, Hisatomo Harima, Shinya Uji. "Cyclotron Resonance and Mass Enhancement by Electron Correlation inKFe2As2." Physical Review Letters 107.16 (2011)