Determination of the Fermi surface of MgB2 by the de Haas-van Alphen effect.
Determination of the Fermi surface of MgB2 by the de Haas-van Alphen effect.
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通过 de Haas-van Alphen 效应测定 MgB2 的费米面。
DOI：
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发表时间：
2003
影响因子：
8.6
通讯作者：
J. Karpiński
中科院分区：
文献类型：
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作者：
A. Carrington;P. Meeson;J. Cooper;L. Balicas;N. Hussey;E. Yelland;S. Lee;A. Yamamoto;S. Tajima;S. Kazakov;J. Karpiński
我们报告的德哈斯-范阿尔芬（dHvA）效应的MgB 2单晶的测量，在磁场高达32 T。与我们早期的工作相反，费米表面所有四层的dHvA轨道都被检测到。我们的结果是在良好的整体协议与计算的电子结构和电子-声子质量增强的各种轨道，但也有一些小的定量差异。特别是，费米面片的相对体积和电子-声子耦合常数的大小的系统差异可能大到足以影响T（c）和其他超导性质的详细计算。
We report measurements of the de Haas-van Alphen (dHvA) effect for single crystals of MgB2, in magnetic fields up to 32 T. In contrast to our earlier work, dHvA orbits from all four sheets of the Fermi surface were detected. Our results are in good overall agreement with calculations of the electronic structure and the electron-phonon mass enhancements of the various orbits, but there are some small quantitative discrepancies. In particular, systematic differences in the relative volumes of the Fermi-surface sheets and the magnitudes of the electron-phonon coupling constants could be large enough to affect detailed calculations of T(c) and other superconducting properties.