From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2 compounds with 5f electron duality

Amorese Andrea; Sundermann Martin; Leedahl BrettMarino AndreaTakegami DaisukeGretarsson HlynurGloskovskii AndreiSchlueter ChristophHaverkort Maurits W.Huang YingkaiSzlawska MariaKaczorowski DariuszRan ShengMaple M. BrianBauer Eric D.Leithe-Jasper AndreasHansmann PhilippThalmeier PeterTjeng Liu HaoSevering Andrea

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From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2 compounds with 5f electron duality

机译：From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2 compounds with 5f electron duality

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Using inelastic X-ray scattering beyond the dipole limit and hard X-ray photoelectron spectroscopy we establish the dual nature of the U 5f electrons in UM2Si2 (M = Pd, Ni, Ru, Fe), regardless of their degree of delocalization. We have observed that the compounds have in common a local atomic-like state that is well described by the U 5f(2) configuration with the Gamma((1))(1) and Gamma(2) quasi-doublet symmetry. The amount of the U 5f(3) configuration, however, varies considerably across the UM2Si2 series, indicating an increase of U 5f itineracy in going from M = Pd to Ni to Ru and to the Fe compound. The identified electronic states explain the formation of the very large ordered magnetic moments in UPd2Si2 and UNi2Si2, the availability of orbital degrees of freedom needed for the hidden order in URu2Si2 to occur, as well as the appearance of Pauli paramagnetism in UFe2Si2. A unified and systematic picture of the UM2Si2 compounds may now be drawn, thereby providing suggestions for additional experiments to induce hidden order and/or superconductivity in U compounds with the tetragonal body-centered ThCr2Si2 structure.

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《Proceedings of the National Academy of Sciences of the United States of America.》 |2020年第48期|30220-30227|共8页
作者
Amorese Andrea; Sundermann Martin; Leedahl BrettMarino AndreaTakegami DaisukeGretarsson HlynurGloskovskii AndreiSchlueter ChristophHaverkort Maurits W.Huang YingkaiSzlawska MariaKaczorowski DariuszRan ShengMaple M. BrianBauer Eric D.Leithe-Jasper AndreasHansmann PhilippThalmeier PeterTjeng Liu HaoSevering Andrea;
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作者单位

Positron Elektron Tandem Ring Anlage 3 PETRA 3,DESY;

Inst Theoret Phys,Heidelberg Univ;

van der Waals Zeeman Inst,Univ AmsterdamInst Low Temp & Struct Res,Polish Acad SciDept Phys,Univ Calif San DiegoMPA Q,Los Alamos Natl LabMax Planck Inst Chem Phys SolidsInst Phys 2,Univ Cologne;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
strongly correlated electron systems; X-ray spectroscopy; uranium heavy fermions; hidden order; MAGNETIC EXCITATIONS; TERNARY COMPOUNDS; FERMI-SURFACE; SUPERCONDUCTIVITY; DIFFRACTION; PHASE; PHOTOEMISSION; TRANSITION; SCATTERING; BEHAVIOR;

From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2 compounds with 5f electron duality

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