Cyclotron resonance in Fe-based superconductor KFe2As 2

Motoi Kimata; Taichi Terashima; Nobuyuki Kurita; Hidetaka Satsukawa; Atsushi Harada; Kouta Kodama; Kanji Takehana; Yasutaka Imanaka; Tadashi Takamasu; Kunihiro Kiho; Chul Ho Lee; Hijiri Kito; Hiroshi Eisaki; Akira Iyo; Hideo Fukazawa; Yoh Kohori; Hisatomo Harima; Shinya Uji

doi:10.1088/1742-6596/400/2/022054

Cyclotron resonance in Fe-based superconductor KFe₂As ₂

Motoi Kimata, Taichi Terashima, Nobuyuki Kurita, Hidetaka Satsukawa, Atsushi Harada, Kouta Kodama, Kanji Takehana, Yasutaka Imanaka, Tadashi Takamasu, Kunihiro Kiho, Chul Ho Lee, Hijiri Kito, Hiroshi Eisaki, Akira Iyo, Hideo Fukazawa, Yoh Kohori, Hisatomo Harima, Shinya Uji

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report cyclotron resonance (CR) measurements for the Fe-based superconductor KFe₂As₂. Only one series of CR with an effective mass of 3.4m_e (m_e is the free electron mass) is observed. The CR signal is attributed to the quasi-two-dimensional α Fermi surface at the Γ point. Our main finding is that the effective mass obtained from the CR is significantly smaller than that obtained from the de-Haas van Alphen (dHvA) measurements. This is the direct evidence of the mass enhancement by electronic correlation. A comparison between the CR and dHvA measurements shows that both intra- and interband electronic correlations contribute to the mass enhancement in KFe₂As₂.

Original language	English
Article number	022054
Journal	Journal of Physics: Conference Series
Volume	400
Issue number	PART 2
DOIs	https://doi.org/10.1088/1742-6596/400/2/022054
Publication status	Published - 2012
Externally published	Yes
Event	26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China Duration: 2011 Aug 10 → 2011 Aug 17

ASJC Scopus subject areas

Physics and Astronomy(all)

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Kimata, M., Terashima, T., Kurita, N., Satsukawa, H., Harada, A., Kodama, K., Takehana, K., Imanaka, Y., Takamasu, T., Kiho, K., Lee, C. H., Kito, H., Eisaki, H., Iyo, A., Fukazawa, H., Kohori, Y., Harima, H., & Uji, S. (2012). Cyclotron resonance in Fe-based superconductor KFe₂As ₂. Journal of Physics: Conference Series, 400(PART 2), [022054]. https://doi.org/10.1088/1742-6596/400/2/022054

Cyclotron resonance in Fe-based superconductor KFe₂As ₂. / Kimata, Motoi; Terashima, Taichi; Kurita, Nobuyuki; Satsukawa, Hidetaka; Harada, Atsushi; Kodama, Kouta; Takehana, Kanji; Imanaka, Yasutaka; Takamasu, Tadashi; Kiho, Kunihiro; Lee, Chul Ho; Kito, Hijiri; Eisaki, Hiroshi; Iyo, Akira; Fukazawa, Hideo; Kohori, Yoh; Harima, Hisatomo; Uji, Shinya.

In: Journal of Physics: Conference Series, Vol. 400, No. PART 2, 022054, 2012.

Research output: Contribution to journal › Conference article › peer-review

Kimata, M, Terashima, T, Kurita, N, Satsukawa, H, Harada, A, Kodama, K, Takehana, K, Imanaka, Y, Takamasu, T, Kiho, K, Lee, CH, Kito, H, Eisaki, H, Iyo, A, Fukazawa, H, Kohori, Y, Harima, H & Uji, S 2012, 'Cyclotron resonance in Fe-based superconductor KFe₂As ₂', Journal of Physics: Conference Series, vol. 400, no. PART 2, 022054. https://doi.org/10.1088/1742-6596/400/2/022054

Kimata, Motoi ; Terashima, Taichi ; Kurita, Nobuyuki ; Satsukawa, Hidetaka ; Harada, Atsushi ; Kodama, Kouta ; Takehana, Kanji ; Imanaka, Yasutaka ; Takamasu, Tadashi ; Kiho, Kunihiro ; Lee, Chul Ho ; Kito, Hijiri ; Eisaki, Hiroshi ; Iyo, Akira ; Fukazawa, Hideo ; Kohori, Yoh ; Harima, Hisatomo ; Uji, Shinya. / Cyclotron resonance in Fe-based superconductor KFe₂As ₂. In: Journal of Physics: Conference Series. 2012 ; Vol. 400, No. PART 2.

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title = "Cyclotron resonance in Fe-based superconductor KFe2As 2",

abstract = "We report cyclotron resonance (CR) measurements for the Fe-based superconductor KFe2As2. Only one series of CR with an effective mass of 3.4me (me is the free electron mass) is observed. The CR signal is attributed to the quasi-two-dimensional α Fermi surface at the Γ point. Our main finding is that the effective mass obtained from the CR is significantly smaller than that obtained from the de-Haas van Alphen (dHvA) measurements. This is the direct evidence of the mass enhancement by electronic correlation. A comparison between the CR and dHvA measurements shows that both intra- and interband electronic correlations contribute to the mass enhancement in KFe2As2.",

author = "Motoi Kimata and Taichi Terashima and Nobuyuki Kurita and Hidetaka Satsukawa and Atsushi Harada and Kouta Kodama and Kanji Takehana and Yasutaka Imanaka and Tadashi Takamasu and Kunihiro Kiho and Lee, {Chul Ho} and Hijiri Kito and Hiroshi Eisaki and Akira Iyo and Hideo Fukazawa and Yoh Kohori and Hisatomo Harima and Shinya Uji",

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doi = "10.1088/1742-6596/400/2/022054",

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T1 - Cyclotron resonance in Fe-based superconductor KFe2As 2

AU - Kimata, Motoi

AU - Terashima, Taichi

AU - Kurita, Nobuyuki

AU - Satsukawa, Hidetaka

AU - Harada, Atsushi

AU - Kodama, Kouta

AU - Takehana, Kanji

AU - Imanaka, Yasutaka

AU - Takamasu, Tadashi

AU - Kiho, Kunihiro

AU - Lee, Chul Ho

AU - Kito, Hijiri

AU - Eisaki, Hiroshi

AU - Iyo, Akira

AU - Fukazawa, Hideo

AU - Kohori, Yoh

AU - Harima, Hisatomo

AU - Uji, Shinya

PY - 2012

Y1 - 2012

N2 - We report cyclotron resonance (CR) measurements for the Fe-based superconductor KFe2As2. Only one series of CR with an effective mass of 3.4me (me is the free electron mass) is observed. The CR signal is attributed to the quasi-two-dimensional α Fermi surface at the Γ point. Our main finding is that the effective mass obtained from the CR is significantly smaller than that obtained from the de-Haas van Alphen (dHvA) measurements. This is the direct evidence of the mass enhancement by electronic correlation. A comparison between the CR and dHvA measurements shows that both intra- and interband electronic correlations contribute to the mass enhancement in KFe2As2.

AB - We report cyclotron resonance (CR) measurements for the Fe-based superconductor KFe2As2. Only one series of CR with an effective mass of 3.4me (me is the free electron mass) is observed. The CR signal is attributed to the quasi-two-dimensional α Fermi surface at the Γ point. Our main finding is that the effective mass obtained from the CR is significantly smaller than that obtained from the de-Haas van Alphen (dHvA) measurements. This is the direct evidence of the mass enhancement by electronic correlation. A comparison between the CR and dHvA measurements shows that both intra- and interband electronic correlations contribute to the mass enhancement in KFe2As2.

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