Role of anion size, magnetic moment, and disorder on the properties of the organic conductor kappa-(BETS)_2Ga_{1-x}Fe_{x}Cl_{4-y}_Br_{y}
E. Steven, H.B. Cui, A. Kismarahardja, J.S. Brooks, D. Graf, and H., Kobayashi
TL;DR
This study investigates how anion size, magnetic moments, and disorder influence the electronic properties of specific organic conductors, revealing correlations with superconductivity and Fermi surface characteristics.
Contribution
It provides new insights into the effects of anion composition on electronic properties in organic conductors using magnetoresistance oscillations.
Findings
Correlations between anion composition and superconducting transition temperature.
Effects of anion size and disorder on Fermi surface topology.
Influence of magnetic moments on effective mass and mean free path.
Abstract
Shubnikov-de Haas and angular dependent magnetoresistance oscillations have been used to explore the role of anion size, magnetic moment, and disorder in the organic conductors kappa-(BETS)_2GaBr_{4} and kappa-(BETS)_2FeCl_{2}_Br_{2} in the isomorphic class kappa-(BETS)_2Ga_{1-x}Fe_{x}Cl_{4-y}_Br_{y}. The results, combined with previous work, show correlations between the anion composition (Ga_{1-x}Fe_{x}Cl_{4-y}_Br_{y}) and the superconducting transition temperature, effective mass, Fermi surface topology, and the mean free path.
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