Optical study on electronic structure of the locally non-centrosymmetric CeRh$_2$As$_2$

Shin-ichi Kimura; Jörg Sichelschmidt; Seunghyun Khim

doi:10.1103/PhysRevB.105.235141

paper

Optical study on electronic structure of the locally non-centrosymmetric CeRh $_{2}$ As $_{2}$

arXiv:2109.00758 · doi:10.1103/PhysRevB.105.235141

Abstract

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 $4 f$ -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.

7 pages, 8 figures

Optical study on electronic structure of the locally non-centrosymmetric CeRh $_{2}$ As $_{2}$

Abstract

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Optical study on electronic structure of the locally non-centrosymmetric CeRh2​As2​

Abstract

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Cited by in corpus (2)

Optical study on electronic structure of the locally non-centrosymmetric CeRh $_{2}$ As $_{2}$