Multigap superconductivity with non-trivial topology in a Dirac semimetal PdTe
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909286005735424 |
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| author | Vashist, Amit Satapathy, Bibek Ranjan Silotia, Harsha Singh, Yogesh Chakraverty, S. |
| author_facet | Vashist, Amit Satapathy, Bibek Ranjan Silotia, Harsha Singh, Yogesh Chakraverty, S. |
| contents | Recently, PdTe has been identified as a Dirac semimetal with potential for unconventional superconductivity based on ARPES measurements. This study presents electrical transport and magnetization measurements conducted on high-quality single crystals of PdTe. Anisotropy in the upper critical magnetic field is observed in resistivity versus temperature data measured under various applied magnetic fields for in-plane (B II ab ) and out-of-plane (B II c) orientations. The magnetic field versus temperature (H - T) phase diagram extracted from resistivity data exhibits an upward curvature akin to several multigap superconductors. Additionally, magnetization measurements reveal de Haas-Van Alphen (dHvA) oscillations in both B II ab and B II c orientations. Fourier analysis of the quantum oscillations identifies two Fermi pockets. Moreover, the Landau fan diagram for a small Fermi pocket confirms a non-trivial Berry phase π, indicative of the Dirac nature of PdTe. Based on quantum oscillation data, a plausible band diagram is constructed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_06424 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multigap superconductivity with non-trivial topology in a Dirac semimetal PdTe Vashist, Amit Satapathy, Bibek Ranjan Silotia, Harsha Singh, Yogesh Chakraverty, S. Superconductivity Recently, PdTe has been identified as a Dirac semimetal with potential for unconventional superconductivity based on ARPES measurements. This study presents electrical transport and magnetization measurements conducted on high-quality single crystals of PdTe. Anisotropy in the upper critical magnetic field is observed in resistivity versus temperature data measured under various applied magnetic fields for in-plane (B II ab ) and out-of-plane (B II c) orientations. The magnetic field versus temperature (H - T) phase diagram extracted from resistivity data exhibits an upward curvature akin to several multigap superconductors. Additionally, magnetization measurements reveal de Haas-Van Alphen (dHvA) oscillations in both B II ab and B II c orientations. Fourier analysis of the quantum oscillations identifies two Fermi pockets. Moreover, the Landau fan diagram for a small Fermi pocket confirms a non-trivial Berry phase π, indicative of the Dirac nature of PdTe. Based on quantum oscillation data, a plausible band diagram is constructed. |
| title | Multigap superconductivity with non-trivial topology in a Dirac semimetal PdTe |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2408.06424 |