Anomalous temperature evolution of the electronic structure of FeSe
Anomalous temperature evolution of the electronic structure of FeSe
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DOI：
10.1103/physrevb.96.100504
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发表时间：
2017-02
影响因子：
3.7
通讯作者：
Y. Kushnirenko;A. Kordyuk;A. Fedorov;E. Haubold;T. Wolf;B. Buchner;S. Borisenko
中科院分区：
文献类型：
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作者：
Y. Kushnirenko;A. Kordyuk;A. Fedorov;E. Haubold;T. Wolf;B. Buchner;S. Borisenko
我们展示了在较宽的温度范围内从结构最简单的铁基超导体 FeSe 中获取的角分辨光电子能谱数据。除了与向列相转变相关的变化之外，我们还检测到数百开氏度范围内非常明显的色散变化。值得注意的是，在加热样品时，能带结构有松弛到传统能带结构计算预测的能带结构的趋势，这与直观预期相反。我们的研究结果揭示了决定铁基材料高温超导性的电子态的主要相互作用的起源。
We present angle-resolved photoemission spectroscopy data taken from the structurally simplest representative of iron-based superconductors, FeSe, in a wide temperature range. Apart from the variations related to the nematic transition, we detect very pronounced shifts of the dispersions on the scale of hundreds of degrees Kelvin. Remarkably, upon warming up the sample, the band structure has a tendency to relax to the one predicted by conventional band structure calculations, directly opposite to what is intuitively expected. Our findings shed light on the origin of the dominant interaction shaping the electronic states responsible for high-temperature superconductivity in iron-based materials.