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.
Original language | English |
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Article number | 022054 |
Journal | Journal of Physics: Conference Series |
Volume | 400 |
Issue number | PART 2 |
DOIs | |
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)