تقرير
Distinct Kondo Screening Behaviors in Heavy Fermion Filled Skutterudites with 4f1 and 4f2 Configurations
| العنوان: | Distinct Kondo Screening Behaviors in Heavy Fermion Filled Skutterudites with 4f1 and 4f2 Configurations |
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| المؤلفون: | Lou, X., Xu, H. C., Yu, T. L., Song, Y. H., Wen, C. H. P., Wei, W. Z., Leithe-Jasper, A., Ding, Z. F., Shu, L., Kirchner, S., Peng, R., Feng, D. L. |
| المصدر: | Phys. Rev. Lett. 126, 136402 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Filled-skutterudite heavy fermion (HF) compounds host rich ground states depending on the f electron configurations. CeOs4Sb12 (COS) with Ce 4f1, and PrOs4Sb12 (POS) with Pr 4f2 configurations show distinct properties of Kondo insulating and HF superconductivity, respectivity. We unveiled the underlying microscopic origin by angle-resolved photoemission spectroscopy studies. Their eV-scale band structure matches well, representing the common characters of conduction electrons in ROs4Sb12 systems (R = rare earth). However, f electrons interact differently with conduction electrons in them. Strong hybridization between conduction electrons and f electrons is observed in COS with band dependent hybridization gaps, and the development of Kondo insulating state is directly revealed. Although the ground state of POS is a singlet, finite but incoherent hybridization exists due to Kondo scattering with the thermally excited triplet crystalline electric field (CEF) state. Our results help to understand the intriguing properties in COS and POS, and provide a clean demonstration of the microscopic differences in HF systems with 4f1 and 4f2 configurations. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.136402 |
| URL الوصول: | http://arxiv.org/abs/2006.05093 |
| رقم الأكسشن: | edsarx.2006.05093 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.126.136402 |
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