Some Electronic Properties of Sr1-xAxCuO2+δ where A=La, K, and Ca
I. Onyszkiewicz, P. Czarnecki, Yu.B. Poltoracky and M. Zimpel
Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
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The electronic properties of Sr1-xAxCuO2+δ (A = La, K, Ca) were examined. The crystal structure of the synthesized compounds was identified as orthorhombic with some admixture of tetragonal phase. For Sr1-xLaxCuO2+δ the insulator-metal like transition was observed with increasing La content. The dx²-y² ground state of Cu ions was deduced from electron spin resonance measurements. The electronic state of Cu ions and their surrounding local symmetry was also found to be La and oxygen content dependent.
DOI: 10.12693/APhysPolA.85.303
PACS numbers: 71.30.+h, 72.15.-v, 76.30.Fc