Transport properties of the oxides Y1-xPrxBa2Cu3O7- delta (0 <= x <= 1): Effects of band filling and lattice distortion on superconductivity.
Transport properties of the oxides Y1-xPrxBa2Cu3O7- delta (0 <= x <= 1): Effects of band filling and lattice distortion on superconductivity.
复制标题
氧化物 Y1-xPrxBa2Cu3O7- δ (0 <= x <= 1) 的传输特性：能带填充和晶格畸变对超导性的影响。
DOI：
10.1103/physrevb.37.7476
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Figueiredo
中科院分区：
文献类型：
--
作者：
Gonçalves;Santos;Lopes;Henriques;Almeida;Figueiredo
The oxides with composition Y 1− x Pr x Ba 2 (Cu 3 O 7− δ)(0≤ x≤ 1) 7-δ (0≤ x≤ 1) are characterized by x-ray diffraction, resistivity (ρ) and thermoelectric power (S) measurements. X-ray diffraction shows an orthorhombically distorted perovskite structure for all compositions, the pseudotetragonality increasing with x. The substitution of the tetravalent Pr for the trivalent Y atom increases the band filling in these materials. As a consequence, the superconducting transition temperature is progressively decreased with increasing x, and S significantly increases. Thermopower and resistivity measurements indicate that these oxides have relatively narrow bands and that the electronic correlations dominate their properties.
