Structural Evolution from Hyper-Honeycomb to Honeycomb Networks and Superconductivity in LaPt$_x$Si$_{2-x}$
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915036926050304 |
|---|---|
| author | Ramakrishnan, Sitaram Yamakawa, Tatsuya Oishi, Ryohei Yamane, Soichiro Ikeda, Atsutoshi Kado, Masaki Shimura, Yasuyuki Takabatake, Toshiro Onimaru, Takahiro Shibata, Yasuhiro Thamizhavel, Arumugam Ramakrishnan, Srinivasan Yonezawa, Shingo Nohara, Minoru |
| author_facet | Ramakrishnan, Sitaram Yamakawa, Tatsuya Oishi, Ryohei Yamane, Soichiro Ikeda, Atsutoshi Kado, Masaki Shimura, Yasuyuki Takabatake, Toshiro Onimaru, Takahiro Shibata, Yasuhiro Thamizhavel, Arumugam Ramakrishnan, Srinivasan Yonezawa, Shingo Nohara, Minoru |
| contents | We report the crystal structures and superconductivity (SC) of LaPt$_{x}$Si$_{2-x}$ ($0.5 \leq x \leq 1.0$) that are solid solutions of LaSi$_{2}$ and LaPtSi with centrosymmetric tetragonal ($I4_{1}/amd$, $D_{4h}^{19}$, \#141) and non-centrosymmetric tetragonal ($I4_{1}md$, $C_{4v}^{11}$, \#109) structures, respectively. It was found that at $0.86 \leq x \leq 1.00$, the non-centrosymmetric tetragonal symmetry is preserved, while partial disorder appears in alternating Pt and Si of the hyper-honeycomb network. The superconducting transition temperature $T_{\rm c}$ was drastically reduced from 3.9 K to 1.5 K as $x$ varies from 1.0 to 0.86. Additionally, a hexagonal phase with an AlB$_{2}$-type structure ($P6/mmm$, $D_{6h}^{1}$, \#191) has been discovered at $0.50 \leq x \leq 0.71$ with a honeycomb network of statistically distributed Pt and Si atoms. The hexagonal phase exhibited SC at $T_{\rm c} = 0.38$ K. This system provides an opportunity to investigate the relationship between topological electronic states, SC, and disorders |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_17033 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Structural Evolution from Hyper-Honeycomb to Honeycomb Networks and Superconductivity in LaPt$_x$Si$_{2-x}$ Ramakrishnan, Sitaram Yamakawa, Tatsuya Oishi, Ryohei Yamane, Soichiro Ikeda, Atsutoshi Kado, Masaki Shimura, Yasuyuki Takabatake, Toshiro Onimaru, Takahiro Shibata, Yasuhiro Thamizhavel, Arumugam Ramakrishnan, Srinivasan Yonezawa, Shingo Nohara, Minoru Superconductivity Strongly Correlated Electrons We report the crystal structures and superconductivity (SC) of LaPt$_{x}$Si$_{2-x}$ ($0.5 \leq x \leq 1.0$) that are solid solutions of LaSi$_{2}$ and LaPtSi with centrosymmetric tetragonal ($I4_{1}/amd$, $D_{4h}^{19}$, \#141) and non-centrosymmetric tetragonal ($I4_{1}md$, $C_{4v}^{11}$, \#109) structures, respectively. It was found that at $0.86 \leq x \leq 1.00$, the non-centrosymmetric tetragonal symmetry is preserved, while partial disorder appears in alternating Pt and Si of the hyper-honeycomb network. The superconducting transition temperature $T_{\rm c}$ was drastically reduced from 3.9 K to 1.5 K as $x$ varies from 1.0 to 0.86. Additionally, a hexagonal phase with an AlB$_{2}$-type structure ($P6/mmm$, $D_{6h}^{1}$, \#191) has been discovered at $0.50 \leq x \leq 0.71$ with a honeycomb network of statistically distributed Pt and Si atoms. The hexagonal phase exhibited SC at $T_{\rm c} = 0.38$ K. This system provides an opportunity to investigate the relationship between topological electronic states, SC, and disorders |
| title | Structural Evolution from Hyper-Honeycomb to Honeycomb Networks and Superconductivity in LaPt$_x$Si$_{2-x}$ |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.17033 |