Low-energy electrodynamics of superconducting diamond.
Low-energy electrodynamics of superconducting diamond.
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DOI：
10.1103/physrevlett.97.097002
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发表时间：
2006-02
影响因子：
8.6
通讯作者：
M. Ortolani;S. Lupi;L. Baldassarre;U. Schade;P. Calvani;Y. Takano;M. Nagao;T. Takenouchi;H. Kawarada
中科院分区：
文献类型：
--
作者：
M. Ortolani;S. Lupi;L. Baldassarre;U. Schade;P. Calvani;Y. Takano;M. Nagao;T. Takenouchi;H. Kawarada
重掺硼的金刚石薄膜在临界温度T_c远高于4K时可以成为超导薄膜。这里，我们首先用相干同步辐射测量了这种薄膜的反射率，最小可达5厘米(-1)。因此，我们确定了光学带隙2Delta，场穿透深度λ，费雷尔-格洛弗-廷卡姆和规则的作用范围，以及电子-声子谱函数α2F(欧米伽)。我们得出结论，金刚石是一种肮脏的BCS超导体。
Heavily boron-doped, diamond films can become superconducting with critical temperatures Tc well above 4 K. Here we first measure the reflectivity of such a film down to 5 cm(-1), by also using coherent synchrotron radiation. We thus determine the optical gap 2Delta, the field penetration depth lambda, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function alpha2F(omega). We conclude that diamond behaves as a dirty BCS superconductor.