Band Dependent Interlayer f -Electron Hybridization in CeRhIn5
| Autor: | X. H. Niu, H. C. Xu, Yong-Ju Zhang, Hanoh Lee, X. C. Lai, S. Y. Tan, Federico Bisti, Xirong Liu, Jian-Xin Zhu, Vladimir N. Strocov, Pavel Dudin, Huiqiu Yuan, C. H. P. Wen, Rui Peng, Qiuyun Chen, Donglai Feng, Stefan Kirchner, L. Shu, D. F. Xu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Superconductivity Field (physics) Condensed matter physics Photoemission spectroscopy General Physics and Astronomy 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences Crystal Atomic orbital 0103 physical sciences Antiferromagnetism 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Physical Review Letters. 120 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.120.066403 |
| Popis: | A key issue in heavy fermion research is how subtle changes in the hybridization between the $4f$ ($5f$) and conduction electrons can result in fundamentally different ground states. ${\mathrm{CeRhIn}}_{5}$ stands out as a particularly notable example: when replacing Rh with either Co or Ir, antiferromagnetism gives way to superconductivity. In this photoemission study of ${\mathrm{CeRhIn}}_{5}$, we demonstrate that the use of resonant angle-resolved photoemission spectroscopy with polarized light allows us to extract detailed information on the $4f$ crystal field states and details on the $4f$ and conduction electron hybridization, which together determine the ground state. We directly observe weakly dispersive Kondo resonances of $f$ electrons and identify two of the three Ce $4{f}_{5/2}^{1}$ crystal-electric-field levels and band-dependent hybridization, which signals that the hybridization occurs primarily between the Ce $4f$ states in the ${\mathrm{CeIn}}_{3}$ layer and two more three-dimensional bands composed of the Rh $4d$ and In $5p$ orbitals in the ${\mathrm{RhIn}}_{2}$ layer. Our results allow us to connect the properties observed at elevated temperatures with the unusual low-temperature properties of this enigmatic heavy fermion compound. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|