Tunneling spectra of $\mathrm{TaO}_x$ junctions for van der Waals superconductors
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866916033058570240 |
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| author | Niu, Yixuan Cheng, Jun Ding, Shiji Guo, Zhongxin Wang, Shang Li, Chenglong Zhang, Meining Cai, Peng |
| author_facet | Niu, Yixuan Cheng, Jun Ding, Shiji Guo, Zhongxin Wang, Shang Li, Chenglong Zhang, Meining Cai, Peng |
| contents | Tunneling spectroscopy and its evolution are crucial for elucidating the intricate electronic structure and emergent phenomena in quantum materials.Nevertheless, high-quality measurements -- specifically those tracking evolution across temperature and external fields -- remain a formidable challenge. We have fabricated a high-quality $\mathrm{TaO}_x$-based planar tunneling junction by using magnetron sputtering for van der Waals (vdW) superconductors. Using the vdW superconductor $\mathrm{Bi}_2\mathrm{Sr}_2\mathrm{CaCu}_2\mathrm{O}_{8+δ}$ (Bi2212) as a benchmark, this platform yields high-quality tunneling spectra, reproducing the electronic signatures obtained from scanning tunneling spectra acquired from atomically clean surfaces under ultra-high vacuum conditions. This architecture enables high-precision spectroscopy across extensive temperature and magnetic field ranges, offering a universal strategy for probing the electronic structures of diverse two-dimensional systems and facilitating future explorations of material properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_21631 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Tunneling spectra of $\mathrm{TaO}_x$ junctions for van der Waals superconductors Niu, Yixuan Cheng, Jun Ding, Shiji Guo, Zhongxin Wang, Shang Li, Chenglong Zhang, Meining Cai, Peng Superconductivity Materials Science Strongly Correlated Electrons Tunneling spectroscopy and its evolution are crucial for elucidating the intricate electronic structure and emergent phenomena in quantum materials.Nevertheless, high-quality measurements -- specifically those tracking evolution across temperature and external fields -- remain a formidable challenge. We have fabricated a high-quality $\mathrm{TaO}_x$-based planar tunneling junction by using magnetron sputtering for van der Waals (vdW) superconductors. Using the vdW superconductor $\mathrm{Bi}_2\mathrm{Sr}_2\mathrm{CaCu}_2\mathrm{O}_{8+δ}$ (Bi2212) as a benchmark, this platform yields high-quality tunneling spectra, reproducing the electronic signatures obtained from scanning tunneling spectra acquired from atomically clean surfaces under ultra-high vacuum conditions. This architecture enables high-precision spectroscopy across extensive temperature and magnetic field ranges, offering a universal strategy for probing the electronic structures of diverse two-dimensional systems and facilitating future explorations of material properties. |
| title | Tunneling spectra of $\mathrm{TaO}_x$ junctions for van der Waals superconductors |
| topic | Superconductivity Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.21631 |