Tracing crystal-field splittings in the rare-earth-based intermetallic CeIrIn5

被引：37

作者：

Chen, Q. Y. ^{[1
,2
,3
]}

Wen, C. H. P. ^{[1
,2
]}

Yao, Q. ^{[1
,2
]}

Huang, K. ^{[1
,2
]}

Ding, Z. F. ^{[1
,2
]}

Shu, L. ^{[1
,2
]}

Niu, X. H. ^{[1
,2
]}

Zhang, Y. ^{[3
]}

Lai, X. C. ^{[3
]}

Huang, Y. B. ^{[4
]}

Zhang, G. B. ^{[5
]}

Kirchner, S. ^{[6
]}

Feng, D. L. ^{[1
,2
,7
]}

机构：

[1] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[3] Sci & Technol Surface Phys & Chem Lab, Mianyang 621908, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China

[5] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[6] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Zhejiang, Peoples R China

[7] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 07期

基金：

中国国家自然科学基金;

关键词：

SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.97.075149

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 CeIrIn5, a heavy-fermion compound and member of the CeMIn5 (M = 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 in CeIrIn5 than CeCoIn5 and the effects of the hybridization on the Fermi volume increase is much smaller than predicted. By providing experimental evidence for 4 f(7/2)(1) splittings which, in CeIrIn5, split the octet into four doublets, we clearly demonstrate the many-body origin of the so-called 4 f(7/2)(1) state.

引用

页数：7

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