Anomalously high supercurrent density in a two-dimensional topological material
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| author | Zhang, Qi Hossain, Md Shafayat Casas, Brian Zheng, Wenkai Cheng, Zi-Jia Lai, Zhuangchai Tu, Yi-Hsin Chang, Guoqing Yao, Yao Li, Siyuan Jiang, Yu-Xiao Mardanya, Sougata Chang, Tay-Rong You, Jing-Yang Feng, Yuan-Ping Cheng, Guangming Yin, Jia-Xin Shumiya, Nana Cochran, Tyler A. Yang, Xian P. Litskevich, Maksim Yao, Nan Watanabe, Kenji Taniguchi, Takashi Zhang, Hua Balicas, Luis Hasan, M. Zahid |
| author_facet | Zhang, Qi Hossain, Md Shafayat Casas, Brian Zheng, Wenkai Cheng, Zi-Jia Lai, Zhuangchai Tu, Yi-Hsin Chang, Guoqing Yao, Yao Li, Siyuan Jiang, Yu-Xiao Mardanya, Sougata Chang, Tay-Rong You, Jing-Yang Feng, Yuan-Ping Cheng, Guangming Yin, Jia-Xin Shumiya, Nana Cochran, Tyler A. Yang, Xian P. Litskevich, Maksim Yao, Nan Watanabe, Kenji Taniguchi, Takashi Zhang, Hua Balicas, Luis Hasan, M. Zahid |
| contents | Ongoing advances in superconductors continue to revolutionize technology thanks to the increasingly versatile and robust availability of lossless supercurrent. In particular high supercurrent density can lead to more efficient and compact power transmission lines, high-field magnets, as well as high-performance nanoscale radiation detectors and superconducting spintronics. Here, we report the discovery of an unprecedentedly high superconducting critical current density (17 MA/cm2 at 0 T and 7 MA/cm2 at 8 T) in 1T'-WS2, exceeding those of all reported two-dimensional superconductors to date. 1T'-WS2 features a strongly anisotropic (both in- and out-of-plane) superconducting state that violates the Pauli paramagnetic limit signaling the presence of unconventional superconductivity. Spectroscopic imaging of the vortices further substantiates the anisotropic nature of the superconducting state. More intriguingly, the normal state of 1T'-WS2 carries topological properties. The band structure obtained via angle-resolved photoemission spectroscopy and first-principles calculations points to a Z2 topological invariant. The concomitance of topology and superconductivity in 1T'-WS2 establishes it as a topological superconductor candidate, which is promising for the development of quantum computing technology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_11425 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Anomalously high supercurrent density in a two-dimensional topological material Zhang, Qi Hossain, Md Shafayat Casas, Brian Zheng, Wenkai Cheng, Zi-Jia Lai, Zhuangchai Tu, Yi-Hsin Chang, Guoqing Yao, Yao Li, Siyuan Jiang, Yu-Xiao Mardanya, Sougata Chang, Tay-Rong You, Jing-Yang Feng, Yuan-Ping Cheng, Guangming Yin, Jia-Xin Shumiya, Nana Cochran, Tyler A. Yang, Xian P. Litskevich, Maksim Yao, Nan Watanabe, Kenji Taniguchi, Takashi Zhang, Hua Balicas, Luis Hasan, M. Zahid Superconductivity Mesoscale and Nanoscale Physics Strongly Correlated Electrons Applied Physics Ongoing advances in superconductors continue to revolutionize technology thanks to the increasingly versatile and robust availability of lossless supercurrent. In particular high supercurrent density can lead to more efficient and compact power transmission lines, high-field magnets, as well as high-performance nanoscale radiation detectors and superconducting spintronics. Here, we report the discovery of an unprecedentedly high superconducting critical current density (17 MA/cm2 at 0 T and 7 MA/cm2 at 8 T) in 1T'-WS2, exceeding those of all reported two-dimensional superconductors to date. 1T'-WS2 features a strongly anisotropic (both in- and out-of-plane) superconducting state that violates the Pauli paramagnetic limit signaling the presence of unconventional superconductivity. Spectroscopic imaging of the vortices further substantiates the anisotropic nature of the superconducting state. More intriguingly, the normal state of 1T'-WS2 carries topological properties. The band structure obtained via angle-resolved photoemission spectroscopy and first-principles calculations points to a Z2 topological invariant. The concomitance of topology and superconductivity in 1T'-WS2 establishes it as a topological superconductor candidate, which is promising for the development of quantum computing technology. |
| title | Anomalously high supercurrent density in a two-dimensional topological material |
| topic | Superconductivity Mesoscale and Nanoscale Physics Strongly Correlated Electrons Applied Physics |
| url | https://arxiv.org/abs/2301.11425 |