Superconductivity and valence state of Tl in TlA2-xLaxCuO5 and TlA2Ca1-xGdxCu2O7 (A=Ba,Sr).
作者： A. Sundaresan , C. S. Gopinath , S. Subramanian , L. C. Gupta , M. Sharon
DOI: 10.1103/PHYSREVB.50.10238
关键词:
摘要: Our X-ray core-level spectroscopic measurements show that the valence state of Tl in Ba containing single-Tl-O-layered compounds TlBa 2−x La x CuO 5 and 2 Ca 1−x Gd Cu O 7 is +3 whereas Sr TlSr between +1. The origin holes latter discussed terms charge transfer 6s band 3d -y addition to generated due excess oxygen. This contrast former wherein oxygen only.
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