Fermi-surface geometry of the Cu-27.5 at. % Pd disordered alloy and short-range order
Fermi-surface geometry of the Cu-27.5 at. % Pd disordered alloy and short-range order
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DOI：
10.1103/physrevb.64.195132
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发表时间：
2001-11-15
影响因子：
3.7
通讯作者：
Shiotani, N
中科院分区：
文献类型：
--
作者：
Matsumoto, I;Kawata, H;Shiotani, N
研究了Cu-27.5At无序相的费米面。%Pd合金从高分辨率康普顿散射数据中进行了三维绘制。对于众所周知的纯铜的费米面，在合金中，颈部消失，腹部沿[110]方向变平，形成一组平行的薄片。所得到的[110]费米半径与由X射线漫反射峰沿[110]方向的间隔间接确定的值符合得很好。实验结果支持了前人的理论预测，即费米面的平行片对在无序相中驱动着短程有序。
The Fermi surface of the disordered phase of Cu-27.5 at. % Pd alloy is three-dimensionally mapped out from high-resolution Compton scattering data. In reference to the well-known Fermi surface of pure Cu, the neck disappears and the belly becomes flattened in the [110] direction in the alloy forming a set of parallel sheets. The obtained [110] Fermi radius is in good accord with the value indirectly determined from the separation along the [110] direction between the x-ray diffuse scattering peaks. The results are regarded as the experimental evidences to support the previous theoretical predictions that the pair of the parallel sheets of the Fermi Surface drives the short-range order in this disordered phase.