Extreme orbital ab-plane upper critical fields far beyond Pauli limit in 4Hb-Ta(S, Se)2 bulk crystals
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
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| _version_ | 1866912789479555072 |
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| author | Meng, Fanyu Fu, Yang Pan, Senyang Tian, Shangjie Yan, Shaohua Li, Zhengyu Wang, Shouguo Zhang, Jinglei Lei, Hechang |
| author_facet | Meng, Fanyu Fu, Yang Pan, Senyang Tian, Shangjie Yan, Shaohua Li, Zhengyu Wang, Shouguo Zhang, Jinglei Lei, Hechang |
| contents | Transition metal disulfides 4Hb-Ta(S, Se)2 with natural heterostructure of 1T- and 1H-Ta(S, Se)2 layers have became the focus of correlated materials their unique combinations of Mott physics and possible topological superconductivity. In this work, we study the upper critical fields mu0Hc2 of 4Hb-TaS2 and 4Hb-TaS1.99Se0.01 single crystals systematically. Transport measurements up to 35 T show that both of ab-plane and c-axis upper critical fields (mu0Hc2,ab and mu0Hc2,c) for 4Hb-TaS2 and 4Hb-TaS1.99Se0.01 exhibit a linear temperature dependent behavior down to 0.3 K, suggesting the three-dimensional superconductivity with dominant orbital depairing mechanism in bulk 4Hb-Ta(S, Se)2. However, the zero-temperature mu0Hc2,ab(0) for both crystals are far beyond the Pauli paramagnetic limit mu0HP. It could be explained by the effects of spin-momentum locking in 1H-Ta(S, Se)2 layers with local inversion symmetry broken and the relatively weak intersublattice interaction between 1H layers due to the existence of 1T layers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_03448 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Extreme orbital ab-plane upper critical fields far beyond Pauli limit in 4Hb-Ta(S, Se)2 bulk crystals Meng, Fanyu Fu, Yang Pan, Senyang Tian, Shangjie Yan, Shaohua Li, Zhengyu Wang, Shouguo Zhang, Jinglei Lei, Hechang Superconductivity Strongly Correlated Electrons Transition metal disulfides 4Hb-Ta(S, Se)2 with natural heterostructure of 1T- and 1H-Ta(S, Se)2 layers have became the focus of correlated materials their unique combinations of Mott physics and possible topological superconductivity. In this work, we study the upper critical fields mu0Hc2 of 4Hb-TaS2 and 4Hb-TaS1.99Se0.01 single crystals systematically. Transport measurements up to 35 T show that both of ab-plane and c-axis upper critical fields (mu0Hc2,ab and mu0Hc2,c) for 4Hb-TaS2 and 4Hb-TaS1.99Se0.01 exhibit a linear temperature dependent behavior down to 0.3 K, suggesting the three-dimensional superconductivity with dominant orbital depairing mechanism in bulk 4Hb-Ta(S, Se)2. However, the zero-temperature mu0Hc2,ab(0) for both crystals are far beyond the Pauli paramagnetic limit mu0HP. It could be explained by the effects of spin-momentum locking in 1H-Ta(S, Se)2 layers with local inversion symmetry broken and the relatively weak intersublattice interaction between 1H layers due to the existence of 1T layers. |
| title | Extreme orbital ab-plane upper critical fields far beyond Pauli limit in 4Hb-Ta(S, Se)2 bulk crystals |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2312.03448 |