A new approach to N-doped di-molybdenum carbide with enhanced superconductivity via Urea
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866912078428635136 |
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| author | Li, Longfu Shi, Lei Zeng, Lingyong Li, Kuan Yu, Peifeng Wang, Kangwang Zhang, Chao Chen, Rui Xiang, Zaichen Zhang, Yunwei Luo, Huixia |
| author_facet | Li, Longfu Shi, Lei Zeng, Lingyong Li, Kuan Yu, Peifeng Wang, Kangwang Zhang, Chao Chen, Rui Xiang, Zaichen Zhang, Yunwei Luo, Huixia |
| contents | Chemical doping is a critical factor in the development of new superconductors or optimizing the superconducting transition temperature (Tc) of the parent superconducting materials. Herein, a new simple urea approach is developed to synthesize the N-doped alfa-Mo2C. Benefiting from the simple urea method, a broad superconducting dome is found in the Mo2C1-xNx compositions. XRD results show that the structure of alfa-Mo2C remains unchanged and that there is a variation of lattice parameters with nitrogen doping. Resistivity, magnetic susceptibility, and heat capacity measurement results confirm that the superconducting transition temperature (Tc) was strongly increased from 2.68 K (x = 0) to 7.05 K (x = 0.49). First-principles calculations and our analysis indicate that increasing nitrogen doping leads to a rise in the density of states at the Fermi level and doping-induced phonon softening, which enhances electron-phonon coupling. This results in an increase in Tc and a sharp rise in the upper critical field. Our findings provide a promising strategy for fabricating transition metal carbonitrides and provide a material platform for further study of the superconductivity of transition metal carbides. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_15099 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A new approach to N-doped di-molybdenum carbide with enhanced superconductivity via Urea Li, Longfu Shi, Lei Zeng, Lingyong Li, Kuan Yu, Peifeng Wang, Kangwang Zhang, Chao Chen, Rui Xiang, Zaichen Zhang, Yunwei Luo, Huixia Superconductivity Chemical doping is a critical factor in the development of new superconductors or optimizing the superconducting transition temperature (Tc) of the parent superconducting materials. Herein, a new simple urea approach is developed to synthesize the N-doped alfa-Mo2C. Benefiting from the simple urea method, a broad superconducting dome is found in the Mo2C1-xNx compositions. XRD results show that the structure of alfa-Mo2C remains unchanged and that there is a variation of lattice parameters with nitrogen doping. Resistivity, magnetic susceptibility, and heat capacity measurement results confirm that the superconducting transition temperature (Tc) was strongly increased from 2.68 K (x = 0) to 7.05 K (x = 0.49). First-principles calculations and our analysis indicate that increasing nitrogen doping leads to a rise in the density of states at the Fermi level and doping-induced phonon softening, which enhances electron-phonon coupling. This results in an increase in Tc and a sharp rise in the upper critical field. Our findings provide a promising strategy for fabricating transition metal carbonitrides and provide a material platform for further study of the superconductivity of transition metal carbides. |
| title | A new approach to N-doped di-molybdenum carbide with enhanced superconductivity via Urea |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2410.15099 |