Signature of point nodal superconductivity in the Dirac semimetal PdTe
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914914631680000 |
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| author | Yadav, C. S. Ghosh, Sudeep Kumar Kumar, Pankaj Thamizhavel, A. Paulose, P. L. |
| author_facet | Yadav, C. S. Ghosh, Sudeep Kumar Kumar, Pankaj Thamizhavel, A. Paulose, P. L. |
| contents | Recent Angle-Resolved Photo-emission Spectroscopy (ARPES) experiments [Phys. Rev. Lett. 130, 046402 (2023)] on PdTe, a 3D-Dirac semimetal and a superconductor with the transition temperature Tc ~ 4.3 K, have revealed compelling evidence of the presence of bulk nodes in the superconducting order parameter. To investigate the validity of this proposition, here we present a detailed investigation of the magnetic field dependence of the specific heat of PdTe down to temperatures ~ 58 mK. We observed that the low temperature specific heat of PdTe with an externally applied magnetic field exhibits a power-law field dependence, a characteristic of unconventional superconductivity. Furthermore, the zero-field low-temperature electronic specific heat follows a cubic temperature dependence, which is a signature of the presence of bulk point nodes in PdTe. These intriguing observations suggest that PdTe is a rare and fascinating topological material that exhibits both Dirac semimetallic properties and superconductivity with point nodal gap symmetry. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_00216 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Signature of point nodal superconductivity in the Dirac semimetal PdTe Yadav, C. S. Ghosh, Sudeep Kumar Kumar, Pankaj Thamizhavel, A. Paulose, P. L. Superconductivity Materials Science Strongly Correlated Electrons Recent Angle-Resolved Photo-emission Spectroscopy (ARPES) experiments [Phys. Rev. Lett. 130, 046402 (2023)] on PdTe, a 3D-Dirac semimetal and a superconductor with the transition temperature Tc ~ 4.3 K, have revealed compelling evidence of the presence of bulk nodes in the superconducting order parameter. To investigate the validity of this proposition, here we present a detailed investigation of the magnetic field dependence of the specific heat of PdTe down to temperatures ~ 58 mK. We observed that the low temperature specific heat of PdTe with an externally applied magnetic field exhibits a power-law field dependence, a characteristic of unconventional superconductivity. Furthermore, the zero-field low-temperature electronic specific heat follows a cubic temperature dependence, which is a signature of the presence of bulk point nodes in PdTe. These intriguing observations suggest that PdTe is a rare and fascinating topological material that exhibits both Dirac semimetallic properties and superconductivity with point nodal gap symmetry. |
| title | Signature of point nodal superconductivity in the Dirac semimetal PdTe |
| topic | Superconductivity Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.00216 |