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18 April 2024

» arxiv » 1608.3490

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Interplay between conducting and magnetic systems in the antiferromagnetic organic superconductor $kappa$-(BETS)$_2$FeBr$_4$
Mark. V. Kartsovnik ; Michael Kunz ; Ludwig Schaidhammer ; Florian Kollmannsberger ; Werner Biberacher ; Natalia D. Kushch ; Akira Miyazaki ; Hideki Fujiwara ;
Date:	11 Aug 2016
Abstract:	The mutual influence of the conduction electron system provided by organic donor layers and magnetic system localized in insulating layers of the molecular charge transfer salt $kappa$-(BETS)$_2$FeBr$_4$ has been studied. It is demonstrated that besides the high-field re-entrant superconducting state, the interaction between the two systems plays important role for the low-field superconductivity. The coupling of normal-state charge carriers to the magnetic system is reflected in magnetic quantum oscillations and can be evaluated based on the angle-dependent beating behaviour of the oscillations. On the other hand, the conduction electrons have their impact on the magnetic system, which is revealed through the pressure-induced changes of the magnetic phase diagram of the material.
Source:	arXiv, 1608.3490
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