Multigap nodeless superconductivity in Dirac semimetal PdTe
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866915717899616256 |
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| author | Shi, Fengrui Qiu, Weilong Chen, Chufan Xu, Chunqiang Zhang, Yan Zheng, Hao Zhou, Yuwei Zhang, Dongting Xie, Mengwei Yuan, Huiqiu Li, Shiyan Liu, Yang Cao, Chao Xu, Xiaofeng Lu, Xin |
| author_facet | Shi, Fengrui Qiu, Weilong Chen, Chufan Xu, Chunqiang Zhang, Yan Zheng, Hao Zhou, Yuwei Zhang, Dongting Xie, Mengwei Yuan, Huiqiu Li, Shiyan Liu, Yang Cao, Chao Xu, Xiaofeng Lu, Xin |
| contents | PdTe has recently been reported to be a type-II Dirac semimetal while a bulk nodal and surface nodeless superconductivity (SC) has been claimed to coexist. In this work, we applied point-contact spectroscopy (PCS) method to systematically study the superconducting gap in PdTe single crystals with a SC transition temperature $T_{c}=4.3$ K. The obtained differential conductance curves show a common deviation from a single-gap superconducting behavior and can be better fitted by a two-gap Blonder-Tinkham-Klapwijk model, suggesting the larger gap $Δ_{L}$ with $2Δ_{L}$=3.7 $k_{B}T_{c}$ and the smaller gap $Δ_S$ yielding $2Δ_{S}$=1.1-2.2 $k_{B}T_{c}$ with a weak interband scattering. The variations of conductance spectra among different contacts are proposed to be caused by the anisotropy of Fermi surface topology associated with different gaps. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_04712 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multigap nodeless superconductivity in Dirac semimetal PdTe Shi, Fengrui Qiu, Weilong Chen, Chufan Xu, Chunqiang Zhang, Yan Zheng, Hao Zhou, Yuwei Zhang, Dongting Xie, Mengwei Yuan, Huiqiu Li, Shiyan Liu, Yang Cao, Chao Xu, Xiaofeng Lu, Xin Superconductivity Strongly Correlated Electrons PdTe has recently been reported to be a type-II Dirac semimetal while a bulk nodal and surface nodeless superconductivity (SC) has been claimed to coexist. In this work, we applied point-contact spectroscopy (PCS) method to systematically study the superconducting gap in PdTe single crystals with a SC transition temperature $T_{c}=4.3$ K. The obtained differential conductance curves show a common deviation from a single-gap superconducting behavior and can be better fitted by a two-gap Blonder-Tinkham-Klapwijk model, suggesting the larger gap $Δ_{L}$ with $2Δ_{L}$=3.7 $k_{B}T_{c}$ and the smaller gap $Δ_S$ yielding $2Δ_{S}$=1.1-2.2 $k_{B}T_{c}$ with a weak interband scattering. The variations of conductance spectra among different contacts are proposed to be caused by the anisotropy of Fermi surface topology associated with different gaps. |
| title | Multigap nodeless superconductivity in Dirac semimetal PdTe |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.04712 |