Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2309.06732 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866912068539514880 |
|---|---|
| author | Wu, Yi Zhang, Yongjun Ju, Sailong Hu, Yong Huang, Yanen Zhang, Yanan Zhang, Huali Zheng, Hao Yang, Guowei Eljaouhari, Evrard-Ouicem Song, Baopeng Plumb, Nicholas C. Steglich, Frank Shi, Ming Zwicknag, Gertrud Cao, Chao Yuan, Huiqiu Liu, Yang |
| author_facet | Wu, Yi Zhang, Yongjun Ju, Sailong Hu, Yong Huang, Yanen Zhang, Yanan Zhang, Huali Zheng, Hao Yang, Guowei Eljaouhari, Evrard-Ouicem Song, Baopeng Plumb, Nicholas C. Steglich, Frank Shi, Ming Zwicknag, Gertrud Cao, Chao Yuan, Huiqiu Liu, Yang |
| contents | The locally noncentrosymmetric heavy fermion superconductor CeRh$_2$As$_2$ has attracted considerable interests due to its rich superconducting phases, accompanied by a quadrupole density wave and pronounced antiferromagnetic excitations. To understand the underlying physics, we here report measurements from high-resolution angle-resolved photoemission. Our results reveal fine splittings of the conduction bands related to the locally noncentrosymmetric structure, as well as a quasi-two-dimensional Fermi surface (FS) with strong $4f$ contributions. The FS exhibits nesting with an in-plane vector $(π/a, π/a)$, which is facilitated by the van Hove singularity near $\bar X$ that arises from the characteristic conduction-$f$ hybridization. The FS nesting provides a natural explanation for the observed antiferromagnetic excitations at $(π/a, π/a)$, which could be intimately connected to its unconventional superconductivity. Our experimental results are well supported by density functional theory plus dynamical mean field theory calculations, which can capture the strong correlation effects. Our study not only provides spectroscopic proof of the key factors underlying the field-induced superconducting transition, but also uncovers the critical role of FS nesting and lattice Kondo effect in the intertwined spin and charge fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_06732 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fermi Surface Nesting with Heavy Quasiparticles in the Locally Noncentrosymmetric Superconductor CeRh$_2$As$_2$ Wu, Yi Zhang, Yongjun Ju, Sailong Hu, Yong Huang, Yanen Zhang, Yanan Zhang, Huali Zheng, Hao Yang, Guowei Eljaouhari, Evrard-Ouicem Song, Baopeng Plumb, Nicholas C. Steglich, Frank Shi, Ming Zwicknag, Gertrud Cao, Chao Yuan, Huiqiu Liu, Yang Strongly Correlated Electrons Materials Science Superconductivity The locally noncentrosymmetric heavy fermion superconductor CeRh$_2$As$_2$ has attracted considerable interests due to its rich superconducting phases, accompanied by a quadrupole density wave and pronounced antiferromagnetic excitations. To understand the underlying physics, we here report measurements from high-resolution angle-resolved photoemission. Our results reveal fine splittings of the conduction bands related to the locally noncentrosymmetric structure, as well as a quasi-two-dimensional Fermi surface (FS) with strong $4f$ contributions. The FS exhibits nesting with an in-plane vector $(π/a, π/a)$, which is facilitated by the van Hove singularity near $\bar X$ that arises from the characteristic conduction-$f$ hybridization. The FS nesting provides a natural explanation for the observed antiferromagnetic excitations at $(π/a, π/a)$, which could be intimately connected to its unconventional superconductivity. Our experimental results are well supported by density functional theory plus dynamical mean field theory calculations, which can capture the strong correlation effects. Our study not only provides spectroscopic proof of the key factors underlying the field-induced superconducting transition, but also uncovers the critical role of FS nesting and lattice Kondo effect in the intertwined spin and charge fluctuations. |
| title | Fermi Surface Nesting with Heavy Quasiparticles in the Locally Noncentrosymmetric Superconductor CeRh$_2$As$_2$ |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2309.06732 |