Fermi surface nesting in Ba 1-x K x BiO 3 observed by Compton scattering: Three-dimensional momentum density reconstruction study
Fermi surface nesting in Ba 1-x K x BiO 3 observed by Compton scattering: Three-dimensional momentum density reconstruction study
复制标题
康普顿散射观察到 Ba 1-x K x BiO 3 中的费米表面嵌套：三维动量密度重建研究
DOI：
10.1103/physrevb.75.121101
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
H. Uwe
中科院分区：
文献类型：
--
作者：
N. Hiraoka;T. Buslaps;V. Honkimäki;J. Ahmad;H. Uwe
我们用康普顿散射测量了三维动量密度，其中（绝缘）和0.37（金属）。从实验康普顿轮廓重建的动量密度表现出显着的差异之间的金属和绝缘样品。绝缘样品中的动量密度被解释为fcc型晶体的填充多面体布里渊区，显示出完美嵌套的费米面的特征。金属样品中的动量密度类似于基于局域密度近似的能带理论所预测的动量密度，但由于费米面嵌套，仍然显示出不寻常的特征。这些功能，其中显示了一些签名的二维重建的数据，我们以前报道过，在本研究中的三维重建数据直接和引人注目的。
We have measured three-dimensional momentum densities inusing Compton scattering, where(insulating) and 0.37 (metallic). The momentum densities reconstructed from experimental Compton profiles exhibit significant differences between the metallic and insulating samples. The momentum densities in theinsulating sample are interpreted to represent the filled, polyhedral Brillouin zone for fcc-type crystals, displaying a feature of the perfectly nested Fermi surface. The momentum densities in themetallic sample resemble those predicted by band theory based on the local-density approximation, but still show an unusual feature due to Fermi-surface nesting. Those features, which showed some signatures in the two-dimensionally reconstructed data that we have previously reported, have been direct and compelling in the three-dimensionally reconstructed data in this study.