Interplay between conducting and magnetic systems in the antiferromagnetic organic superconductor $\kappa$-(BETS)${}_2$FeBr${}_4$

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.

arXiv comment6 pages, 6 figures

References in corpus (6)

• Theory of Intertwined Orders in High Temperature Superconductors
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Inhomogeneity of charge density wave order and quenched disorder in a high Tc superconductor
• Nanoscale phase separation in the iron chalcogenide superconductor K0.8Fe1.6Se2 as seen via scanning nanofocused x-ray diffraction
• Magnetic-field-induced superconductivity in layered organic molecular crystals with localized magnetic moments
• Shubnikov-de Haas effect and Yamaji oscillations in the antiferromagnetically ordered organic superconductor k-(BETS)2FeBr4: A Fermiology study

Cited by in corpus (6)

• Ingredients for Generalized Models of $\kappa$-Phase Organic Charge-Transfer Salts: A Review
• Experimental evidence for Zeeman spin-orbit coupling in layered antiferromagnetic conductors
• Spin Vortex Crystal Order in Organic Triangular Lattice Compound
• Fermi surface properties of the bifunctional organic metal $\kappa$-(BETS)${}_2$Mn[N(CN)${}_2$]${}_3$ near the metal--insulator transition
• Interplay between the d- and pi-electron systems in magnetic torque of the layered organic conductor \k{appa}-(BETS)2Mn[N(CN)2]3
• Lattice, Charge and Spin phase inhomogeneity in complex striped quantum matter