Unique quantum metallic state in the titanium sesquioxide heterointerface superconductor
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866916446283497472 |
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| author | Zhang, Guanqun Liu, Yixin Ning, Zhongfeng Li, Guoan Wang, Jinghui Wu, Yueshen Wang, Lijie Xue, Huanyi Gao, Chunlei An, Zhenghua Li, Jun Shen, Jie Mu, Gang Chen, Yan Li, Wei |
| author_facet | Zhang, Guanqun Liu, Yixin Ning, Zhongfeng Li, Guoan Wang, Jinghui Wu, Yueshen Wang, Lijie Xue, Huanyi Gao, Chunlei An, Zhenghua Li, Jun Shen, Jie Mu, Gang Chen, Yan Li, Wei |
| contents | The emergence of quantum metallic state marked by a saturating finite electrical resistance in the zero-temperature limit in a variety of two-dimensional superconductors injects an exciting momentum to the realm of heterostructure superconductivity. Despite much research efforts over last few decades, there is not yet a general consensus on the nature of this unexpected quantum metal. Here, we report the observation of a unique quantum metallic state within the hallmark of Bose-metal in the titanium sesquioxide heterointerface superconductor Ti$_2$O$_3$/GaN. Remarkably, the quantum bosonic metallic state continuously tuned by a magnetic field in the vicinity of the two-dimensional superconductivity-metal transition persists in the normal phase, indicating the existence of composite bosons formed by electron Cooper pairs even in the normal phase. Our findings provide a distinct evidence for electron pairing in the normal phase of heterointerface superconductors, and shed fresh light on the pairing nature underlying heterointerface superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_04035 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Unique quantum metallic state in the titanium sesquioxide heterointerface superconductor Zhang, Guanqun Liu, Yixin Ning, Zhongfeng Li, Guoan Wang, Jinghui Wu, Yueshen Wang, Lijie Xue, Huanyi Gao, Chunlei An, Zhenghua Li, Jun Shen, Jie Mu, Gang Chen, Yan Li, Wei Superconductivity Strongly Correlated Electrons The emergence of quantum metallic state marked by a saturating finite electrical resistance in the zero-temperature limit in a variety of two-dimensional superconductors injects an exciting momentum to the realm of heterostructure superconductivity. Despite much research efforts over last few decades, there is not yet a general consensus on the nature of this unexpected quantum metal. Here, we report the observation of a unique quantum metallic state within the hallmark of Bose-metal in the titanium sesquioxide heterointerface superconductor Ti$_2$O$_3$/GaN. Remarkably, the quantum bosonic metallic state continuously tuned by a magnetic field in the vicinity of the two-dimensional superconductivity-metal transition persists in the normal phase, indicating the existence of composite bosons formed by electron Cooper pairs even in the normal phase. Our findings provide a distinct evidence for electron pairing in the normal phase of heterointerface superconductors, and shed fresh light on the pairing nature underlying heterointerface superconductivity. |
| title | Unique quantum metallic state in the titanium sesquioxide heterointerface superconductor |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2211.04035 |