Spin glass behavior of insulating K0.8Fe2-xS2
Hechang Lei, Milinda Abeykoon, Emil S. Bozin, and C. Petrovic
TL;DR
This study reports the discovery of KxFe2-yS2 single crystals, revealing spin-glass behavior below 32 K, and highlights how stoichiometry and defects influence their physical properties.
Contribution
It is the first report of spin-glass behavior in insulating KxFe2-yS2, expanding understanding of magnetic states in iron chalcogenides.
Findings
KxFe2-yS2 is a small gap semiconductor
Spin-glass behavior observed below 32 K
Stoichiometry and defects affect physical properties
Abstract
We report the discovery of KxFe2-yS2 single crystals, isostructural to KxFe2-ySe2 superconductors. The sulfide compound is a small gap semiconductor and shows spin-glass behavior below 32 K. Our results indicate that stoichiometry, defects, and the local environment of FeCh (Ch = S,Se) tetrahedra have important effects on the physical properties of isostructural and isoelectronic KxFe2-yCh2 compounds.
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Taxonomy
TopicsIron-based superconductors research · Rare-earth and actinide compounds · Physics of Superconductivity and Magnetism