Generic superconducting phase behavior in high-Tc cuprates: Tc variation with hole concentration in YBa2Cu3O7- delta.
Generic superconducting phase behavior in high-Tc cuprates: Tc variation with hole concentration in YBa2Cu3O7- delta.
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DOI：
10.1103/physrevb.51.12911
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发表时间：
1995-05
期刊：
影响因子：
--
通讯作者：
J. Tallon;C. Bernhard;H. Shaked;R. Hitterman;J. Jorgensen
中科院分区：
文献类型：
--
作者：
J. Tallon;C. Bernhard;H. Shaked;R. Hitterman;J. Jorgensen
对于Y{下标1{负}{下标x}}Ca{下标x}}Ba{下标2}Cu{下标3}O{下标7{负}{δ δ}}，当{δ p}={δ x}/2时，可以直接确定{δ T}{下标c}}与空穴浓度{δ p}之间的关系。通过测量{ital T}{下标{ital c}}、热电功率{ital S}和中子衍射精化计算出的各种{ital x}和{delta}值的键价和，可以完全确定{ital p}={ital p}（{delta}）、{ital T}{下标{ital c}}={ital T}{下标c}}（{ital p}）的关系。和{数字S}={数字S}（{数字T}，{数字p}）证实了YBa{下标2}Cu{下标3}O{下标7{负}{δ}}在这些量上满足与其他高-{数字T}{下标c}}超导铜酸盐相同的普遍关系。
A direct determination of the relationship between {ital T}{sub {ital c}} and hole concentration {ital p} for Y{sub 1{minus}{ital x}}Ca{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} is obtained by investigating the properties of the fully oxygen-deficient ({delta}{approx}1.0) compound for which {ital p}={ital x}/2. Measurements of {ital T}{sub {ital c}}, the thermoelectric power {ital S}, and bond-valence sums calculated from neutron-diffraction refinements for various values of {ital x} and {delta} allow the full determination of the relations {ital p}={ital p}({delta}), {ital T}{sub {ital c}}={ital T}{sub {ital c}}({ital p}), and {ital S}={ital S}({ital T},{ital p}) confirming that YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} satisfies the same universal relations in these quantities as the other high-{ital T}{sub {ital c}} superconducting cuprates.