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Over-doping of Tl2Ba2CuO6 due to charge transfer Tl-(Cu-O) |
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| Authors: | S. Nakajima M. Kikuchi T. Oku N. Kobayashi T. Suzuki K. Nagase K. Hiraga Y. Muto Y. Syono |
| Affiliation: | Institute for Materials Research, Tohoku University, Katahira, Sendai 980, Japan a Hachioji Research Center, CASIO, Hachioji 192, Japan b Steel Research Center, NKK Corporation, Kawasaki 210, Japan c College of General Education, Tohoku University, Aoba, Sendai 980, Japan |
| Abstract: | Superconductivity was observed in La substituted Tl2Ba2CuO6. Both Tc and unit cell dimension, a, increase with increasing La concentration, indicating that an over-doping state in Tl2Ba2CuO6, which was due to charge transfer Tl3−t-(Cu-O)p as supported from XPS measurements, was relieved by La substitution for Ba. |
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