六方La2Ni7中连续巡游磁性转变的电子特征
Electronic signatures of successive itinerant, magnetic transitions in hexagonal La2Ni7
AI总结：
本文结合ARPES与DFT计算，研究了六方La2Ni7在三个连续磁转变温度下的电子结构重构，揭示了镍基弱巡游反铁磁体中磁有序对能带的影响。
摘要：
我们利用高分辨率角分辨光电子能谱（ARPES）和密度泛函理论（DFT）计算，研究了La2Ni7的电子和磁性质。La2Ni7是一个巡游磁性系统，在降温过程中经历一系列三个磁转变温度，最终进入弱巡游反铁磁（wAFM）基态。我们的ARPES数据揭示了在Γ点附近具有六方对称性的多个电子和空穴口袋。我们观察到在T1 = 61 K、T2 = 57 K和T3 = 42 K的连续磁转变过程中，能带结构发生了显著重构。实验数据与DFT计算结果合理吻合，表明DFT计算适用于巡游反铁磁系统。我们的结果详细揭示了镍基弱反铁磁体中磁有序对电子结构的影响。
英文摘要：
We use high-resolution angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to study the electronic and magnetic properties of La2Ni7, an itinerant magnetic system with a series of three magnetic transition temperatures upon cooling, which end in a weak itinerant antiferromagnetic (wAFM) ground state. Our APRES data reveal several electron and hole pockets that have hexagonal symmetry near the $Γ$ point. We observe significant reconstruction of the band structure upon successive magnetic transitions at T1 = 61 K, T2 = 57 K and T3 = 42 K. The experimental data are in a reasonable agreement with DFT calculations, demonstrating their applicability to itinerant antiferromagnet systems. Our results detail the effects of magnetic ordering on the electronic structure in a Ni-based weak antiferromagnet.
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