Tracing crystal-field splittings in the rare-earth-based intermetallic CeIrIn5
Tracing crystal-field splittings in the rare-earth-based intermetallic CeIrIn5
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追踪稀土金属间化合物 CeIrIn5 中的晶体场分裂
DOI：
10.1103/physrevb.97.075149
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发表时间：
2018
影响因子：
3.7
通讯作者：
QY et al.
中科院分区：
文献类型：
--
作者：
Chen;QY et al.
稀土金属间化合物中的晶体电场态显示出与这些系统中发生的多体物理的复杂纠缠，并且已知会导致过多的电子相。在这里，我们试图追踪重费米子化合物和（Co, Rh, Ir）家族成员对晶体电场（CEF）分裂的不同贡献。为此，我们利用高分辨率共振角分辨光发射光谱（ARPES），在宽温度范围内对这种非常规超导体的电子结构进行了光谱研究。因此，我们展示了如何将ARPES与热力学测量或中子散射结合使用，以解开稀土金属间化合物中CEF分裂的不同贡献。我们还发现，杂化作用更强，杂化作用对费米体积增大的影响远小于预测。通过提供分裂的实验证据，即将八元体分裂成四个双重体，我们清楚地证明了所谓状态的多体起源。
Crystal electric field states in rare earth intermetallics show an intricate entanglement with the many-body physics that occurs in these systems and that is known to lead to a plethora of electronic phases. Here we attempt to trace different contributions to the crystal electric field (CEF) splittings in, a heavy-fermion compound and member of the(Co, Rh, Ir) family. To this end, we utilize high-resolution resonant angle-resolved photoemission spectroscopy (ARPES) and present a spectroscopic study of the electronic structure of this unconventional superconductor over a wide temperature range. As a result, we show how ARPES can be used in combination with thermodynamic measurements or neutron scattering to disentangle different contributions to the CEF splitting in rare earth intermetallics. We also find that the hybridization is stronger inthanand the effects of the hybridization on the Fermi volume increase is much smaller than predicted. By providing experimental evidence forsplittings which, in, split the octet into four doublets, we clearly demonstrate the many-body origin of the so-calledstate.