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Spin glass behavior of insulating K0.8Fe2-xS2

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arxiv 1101.5616 v2 pith:GG6WBMJQ submitted 2011-01-28 cond-mat.supr-con cond-mat.mtrl-scicond-mat.str-el

Spin glass behavior of insulating K0.8Fe2-xS2

Hechang Lei , Milinda Abeykoon , Emil S. Bozin , C. Petrovic This is my paper
classification cond-mat.supr-con cond-mat.mtrl-scicond-mat.str-el
keywords behaviorisostructuralbelowcompoundcompoundscrystalsdefectsdiscovery
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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