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Get Free AccessInterfaces between transition-metal oxides are able to host two-dimensional electron gases (2DEGs) and exhibit exotic quantum phenomena. Here we report the observation of superconductivity below 230 mK for the heterostructure composed of SrNbO3 (SNO) and SrTiO3 (STO). Different from some other counterparts with two insulators, the metallic SNO provides a novel mechanism to form a quasi 2DEG by charge transfer from bulk towards interface under strain. The superconductivity, residing within the strained SNO layer near the interface, is contributed by an electron system with record-low carrier density. Notably, although embedded in a normal metallic layer with a carrier density 4 to 5 orders higher, the electron system is still uniquely well-protected to retain high mobility and lies deep in extreme quantum regime.
Haoran Wei, Shengru Chen, Yuting Zou, Yuxin Wang, Meng Yang, Qinghua Zhang, Lin Gu, Kun Jiang, Er‐Jia Guo, Zhi Gang Cheng (2022). Dimensionality-confined superconductivity within SrNbO3-SrTiO3 heterostructures. , DOI: https://doi.org/10.48550/arxiv.2212.12638.
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Type
Preprint
Year
2022
Authors
10
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.48550/arxiv.2212.12638
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