Optical study on electronic structure of the locally non-centrosymmetric CeRh$_2$As$_2$
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| Format: | Preprint |
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2021
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| _version_ | 1866909120503742464 |
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| author | Kimura, Shin-ichi Sichelschmidt, Jörg Khim, Seunghyun |
| author_facet | Kimura, Shin-ichi Sichelschmidt, Jörg Khim, Seunghyun |
| contents | The electronic structures of the heavy-fermion superconductor CeRh$_2$As$_2$ with the local inversion symmetry breaking and the reference material LaRh$_2$As$_2$ have been investigated by using experimental optical conductivity ($σ_1(ω)$) spectra and first-principal DFT calculations. In the low-temperature $σ_1(ω)$ spectra of CeRh$_2$As$_2$, a $4f$-conduction electron hybridization and heavy quasiparticles are clearly indicated by a mid-infrared peak and a narrow Drude peak. In LaRh$_2$As$_2$, these features are absent in the $σ_1(ω)$ spectrum, however, it can nicely be reproduced by DFT calculations. For both compounds, the combination between a local inversion symmetry breaking and a large spin-orbit (SO) interaction plays an important role for the electronic structure, however, the SO splitting bands could not be resolved in the $σ_1(ω)$ spectra due to the small SO splitting size. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2109_00758 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Optical study on electronic structure of the locally non-centrosymmetric CeRh$_2$As$_2$ Kimura, Shin-ichi Sichelschmidt, Jörg Khim, Seunghyun Strongly Correlated Electrons The electronic structures of the heavy-fermion superconductor CeRh$_2$As$_2$ with the local inversion symmetry breaking and the reference material LaRh$_2$As$_2$ have been investigated by using experimental optical conductivity ($σ_1(ω)$) spectra and first-principal DFT calculations. In the low-temperature $σ_1(ω)$ spectra of CeRh$_2$As$_2$, a $4f$-conduction electron hybridization and heavy quasiparticles are clearly indicated by a mid-infrared peak and a narrow Drude peak. In LaRh$_2$As$_2$, these features are absent in the $σ_1(ω)$ spectrum, however, it can nicely be reproduced by DFT calculations. For both compounds, the combination between a local inversion symmetry breaking and a large spin-orbit (SO) interaction plays an important role for the electronic structure, however, the SO splitting bands could not be resolved in the $σ_1(ω)$ spectra due to the small SO splitting size. |
| title | Optical study on electronic structure of the locally non-centrosymmetric CeRh$_2$As$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2109.00758 |