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Cyclotron resonance harmonics in the organic superconductor $β^{\prime\prime}$-(BEDT-TTF)$_2$SF$_5$CH$_2$CF$_2$SO$_3$; observation of a new kind of effective mass renormalization

R. S. Edwards·J. A. Symington·A. Ardavan·J. Singleton·E. Rzepniewski·R. D. McDonald·J. Schlueter·A. M. Kini
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Abstract

Cyclotron resonance, along with its second and third harmonics, has been observed in the quasi-two-dimensional organic superconductor $β^{\prime\prime}$-(BEDT-TTF)$_2$SF$_5$CH$_2$CF$_2$SO$_3$. The harmonic content is richly angle-dependent, and is interpreted in terms of the interlayer warping of the Fermi surface giving rise to the cyclotron resonance. In a departure from Kohn's theorem, but in agreement with recent theoretical predictions, the effective mass deduced from the cyclotron resonance measurements is greater than that determined from magnetic quantum oscillations.

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R. S. Edwards, J. A. Symington, A. Ardavan, J. Singleton, E. Rzepniewski, R. D. McDonald, J. Schlueter, A. M. Kini. 2001-05-31. Cyclotron resonance harmonics in the organic superconductor $β^{\prime\prime}$-(BEDT-TTF)$_2$SF$_5$CH$_2$CF$_2$SO$_3$; observation of a new kind of effective mass renormalization. https://arxiv.org/abs/cond-mat/0105505

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