Internal charge transfer in tetragonal superconductor (CaxLa1−x)(Ba1.75−xLa0.25+x) Cu3Oy
作者： D. Goldschmidt , G.M. Reisner , Y. Direktovich , A. Knizhnik , E. Gartstein
DOI: 10.1016/0921-4534(93)90815-8
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摘要: Abstract We report (Ca x La 1− ) (Ba 1.75− 0.25+ Cu 3 O y , that is a tetragonal superconductor family within the 1:2:3 system existing for 0≤ ≤0.5. With constant Q (= 7.25, denoting charge on non copper cations) and ( ≅7.1) average mobile hole densities do not change with . Nevertheless, there big increase in T c Besides, very sensitive to small changes or In addition, resistivity of low compositions increases by an order magnitude from metallic semiconductorlike behaviour upon decrease attribute this unusual substitutes Ba. It attracts more oxygens plane “chains” induce orthorhombic phase transition. These then promote additional internal electron transfer planes “chains”.
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