论文标题
依赖动量$ d_ {xz/yz} $ band spripting in lafeaso
Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO
论文作者
论文摘要
我们对Lafeaso的列相电子结构进行了角度分辨光发射光谱（ARPES）研究。在列前相中，观察到γ和m点附近的DXZ和DYZ孔带之间的退化性破裂。在γ和M点观察到不同温度依赖的带分裂行为。随着温度降低，在γ点附近的温度依赖性很小的同时，频带分裂的能量会降低。通过使用压电装置的DETWIN实验确认了带M点附近的带移的列性性质。由于在其他基于铁的超导体中观察到了依赖动量的分裂行为，因此我们的观察结果证实了该行为是基于铁的超导体中的普遍行为。
We performed angle-resolved photoemission spectroscopy (ARPES) studies of the electronic structure of the nematic phase in LaFeAsO. Degeneracy breaking between the dxz and dyz hole bands near the Γ and M point is observed in the nematic phase. Different temperature dependent band splitting behaviors are observed at the Γ and M points. The energy of the band splitting near the M point decreases as the temperature decreases while it has little temperature dependence near the Γ point. The nematic nature of the band shift near the M point is confirmed through a detwin experiment using a piezo device. Since a momentum dependent splitting behavior has been observed in other iron based superconductors, our observation confirms that the behavior is a universal one among iron based superconductors.
