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Proposal to determine the Fermi-surface topology of a doped iron-based superconductor using bulk-sensitive Fourier-transform Compton scattering

机译:使用体敏傅里叶变换康普顿散射确定掺杂铁基超导体费米表面拓扑的建议

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摘要

We have carried out first-principles calculations of the Compton scattering spectra to demonstrate that the filling of the hole Fermi surface in LaO_(1-x)F_xFeAs produces a distinct signature in the Fourier-transformed Compton spectrum when the momentum transfer vector lies along the [100] direction. We thus show how the critical concentration x_c, where hole Fermi-surface pieces are filled up and the superconductivity mediated by antiferromagnetic spin fluctuations is expected to be suppressed, can be obtained in a bulk-sensitive manner.
机译:我们已经对康普顿散射光谱进行了第一性原理计算,以证明当动量传递矢量位于LaO_(1-x)F_xFeAs中时,孔的费米表面的填充在傅立叶变换的康普顿谱中产生明显的特征。 [100]方向。因此,我们示出了如何以体积敏感的方式获得临界浓度x_c,在该浓度下空穴费米表面块被填满并且反铁磁自旋波动介导的超导电性有望得到抑制。

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