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Spin glass in semiconducting KFe_(1.05)Ag_(0.88)Te₂ single crystals

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arxiv 1604.06086 v1 pith:QCSGKRQN submitted 2016-04-20 cond-mat.str-el cond-mat.mtrl-scicond-mat.supr-con

Spin glass in semiconducting KFe_(1.05)Ag_(0.88)Te₂ single crystals

Hyejin Ryu , Hechang Lei , B. Klobes , J. B. Warren , R. P. Hermann , C. Petrovic This is my paper
classification cond-mat.str-el cond-mat.mtrl-scicond-mat.supr-con
keywords semiconductingcrystalsglassgroundsinglespinstateabsent
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We report discovery of KFe$_{1.05}$Ag$_{0.88}$Te$_{2}$ single crystals with semiconducting spin glass ground state. Composition and structure analysis suggest nearly stoichiometric I4/mmm space group but allow for the existence of vacancies, absent in long range semiconducting antiferromagnet KFe$_{0.85}$Ag$_{1.15}$Te$_{2}$. The subtle change in stoichometry in Fe/Ag sublattice changes magnetic ground state but not conductivity, giving further insight into the semiconducting gap mechanism.

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