Pressure and field dependence of superconductivity in Rb3C60.
Pressure and field dependence of superconductivity in Rb3C60.
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Rb3C60 中超导性的压力和场依赖性。
DOI：
10.1103/physrevlett.68.1228
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发表时间：
1992
影响因子：
8.6
通讯作者：
K. Holczer
中科院分区：
文献类型：
--
作者：
G. Sparn;J. Thompson;R. Whetten;S.;R. Kaner;F. Diederich;G. Grüner;K. Holczer
对单相Rb{sub 3} c {sub 60}的超导转变温度{ital T}{sub {ital c}}的压力依赖性的直接测量首次提供了实质性的证据，证明{ital A}{sub 3} c {sub 60}化合物中的{ital T}{sub {ital c}}可能是晶格常数（c {sub 60}间距）的普遍函数。本文还报道了下临界场（{ital H}{次{ital c}1}）和上临界场（{ital H}{次{ital c}2}）的测定，以及超导穿透深度和相干长度的测定。与K{sub 3}C{sub 60}相比，Rb{sub 3}C{sub 60}的电子态密度比K{sub 60}高15%，这是由于该化合物中C{sub 60}之间的间距较大。
Direct measurements of the pressure dependence of the superconducting transition temperature {ital T}{sub {ital c}} for single-phase Rb{sub 3}C{sub 60} provide for the first time substantial evidence that {ital T}{sub {ital c}} in {ital A}{sub 3}C{sub 60} compounds may be a universal function of the lattice constant (inter-C{sub 60} spacing). Determination of the lower ({ital H}{sub {ital c}1}) and upper ({ital H}{sub {ital c}2}) critical fields, and consequently the superconducting penetration depth and coherence length, is also reported. Compared to K{sub 3}C{sub 60}, the measured quantities are consistent with a 15% larger electronic-state density in Rb{sub 3}C{sub 60} arising from a greater inter-C{sub 60} spacing in this compound.