Transport and quantum oscillations in the quasi-one-dimensional superconductor V2Ga5
Y. L. Huang, Z. Y. Zhang, Z. Y. Liu, P. T. Yang, B. Li, C. Q. Xu, B. S. Wang, W. Zhou, Wen-He Jiao, S. Xu, Ziming Zhu, T. Shiroka, Xiangzhuo Xing, Zhu'an Xu, Dong Qian, Shiyan Li, Xianglin Ke, J.-G. Cheng, Xiaofeng Xu
DOI 10.1103/PhysRevB.111.024503 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The quasi-one-dimensional superconductor V2Ga5, with the superconducting transition temperature Tc∼3.6K, has recently been proposed to be an intermetallic topological material, although the experimental evidence for its nontrivial band topology is still lacking. Here, we report on its electrical and thermoelectric transport properties, as well as on its quantum de Haas-van Alphen (dHvA) oscillations. At low temperatures, V2Ga5 shows a linear-in-B magnetoresistance, a scaling typically seen in many topological materials. Its thermoelectric power shows a pronounced two-peak profile, one centered around 70 K and the other one at ∼10 K, while the Nernst coefficient exhibits a significant enhancement in the same temperature range. Quantum dHvA oscillations reveal a single frequency, with a nontrivial Berry phase close to π, associated with the putative topological carriers in its α pocket. Finally, the superconductivity is found to be linearly suppressed by physical pressure, with the upper critical field Hc2 consistent with the two-gap superconductivity in this topological superconductor candidate. Our results provide the direct experimental evidence for the existence of topological carriers in this quasi-one-dimensional superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| V2Ga5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.6 | Pressure not reported | onset |
Similar papers
Physical properties and electronic structure of the two-gap superconductor V2Ga5
similarity 0.95P.-Y. Cheng et al.
Source status unknown — claims are unverified
Multigap nodeless superconductivity in the Dirac intermetallic alloy V2Ga5 with one-dimensional vanadium chains
similarity 0.94C. Q. Xu et al.
Source status unknown — claims are unverified
Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4
similarity 0.89A. Bhattacharyya et al.
Source status unknown — claims are unverified
Two-dimensional superconductor-insulator transition in bulk single-crystal YBa2Cu3O6.38
similarity 0.89G. T. Seidler et al.
Source status unknown — claims are unverified
AC calorimetric study of magneto-quantum oscillations in anisotropic multiband VGa superconductor
similarity 0.89Yevhen V. Petrenko et al. · 2026 · arXiv:2606.17750
Source status unknown — claims are unverified
Pressure-enhanced superconductivity in VN with coexistence of weakly interacting spin fluctuations
similarity 0.89Chenglu Huang et al.
Source status unknown — claims are unverified