| Autor: |
P.-Y. Cheng, Mohamed Oudah, T.-L. Hung, C.-E. Hsu, C.-C. Chang, J.-Y. Haung, T.-C. Liu, C.-M. Cheng, M.-N. Ou, W.-T. Chen, L. Z. Deng, C.-C. Lee, Y.-Y. Chen, C.-N. Kuo, C.-S. Lue, Janna Machts, Kenji M. Kojima, Alannah M. Hallas, C.-L. Huang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Physical Review Research, Vol 6, Iss 3, p 033253 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2643-1564 |
| DOI: |
10.1103/PhysRevResearch.6.033253 |
| Popis: |
We present a thorough investigation of the physical properties and superconductivity of the binary intermetallic V_{2}Ga_{5}. Electrical resistivity and specific heat measurements show that V_{2}Ga_{5} enters its superconducting state below T_{sc}= 3.5 K, with a critical field of H_{c2,⊥c}(H_{c2,||c})=6.5(4.1) kOe. With H⊥c, the peak effect was observed in resistivity measurements, indicating the ultrahigh quality of the single crystal studied. The resistivity measurements under high pressure reveal that the T_{sc} is suppressed linearly with pressure and reaches absolute zero around 20 GPa. Specific heat and muon spin relaxation measurements indicate that the two-gap s-wave model best describes the superconductivity of V_{2}Ga_{5}. The bands near the Fermi level around the Z and Γ points are observed and analyzed by the angle-resolved photoemission spectroscopy measurements and first-principles band structure calculations. We therefore conclude that V_{2}Ga_{5} is a phonon-mediated two-gap s-wave superconductor. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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