Two-dimensional superconductivity and anisotropic transport at KTaO<sub>3</sub> (111) interfaces

doi:10.1126/science.aba5511

GSTDTAP > 气候变化

DOI	10.1126/science.aba5511
	Two-dimensional superconductivity and anisotropic transport at KTaO₃ (111) interfaces
	Changjiang Liu; Xi Yan; Dafei Jin; Yang Ma; Haw-Wen Hsiao; Yulin Lin; Terence M. Bretz-Sullivan; Xianjing Zhou; John Pearson; Brandon Fisher; J. Samuel Jiang; Wei Han; Jian-Min Zuo; Jianguo Wen; Dillon D. Fong; Jirong Sun; Hua Zhou; Anand Bhattacharya
	2021-02-12
发表期刊	Science
出版年	2021
英文摘要	Interfaces between materials can harbor quantum states that belong to neither of the materials. A classic example is the superconducting interface between two insulating oxides, LaAlO3 and SrTiO3, with a critical temperature of around 200 millikelvin. Liu et al. observed superconductivity at a different interface—formed between KTaO3 as a substrate and an overlayer of either EuO or LaAlO3—at a considerably higher temperature of about 2 kelvin. Transport measurements displayed anisotropy, which may indicate an unusual superconducting state. Science , this issue p. [716][1] The distinctive electronic structure found at interfaces between materials can allow unconventional quantum states to emerge. Here we report on the discovery of superconductivity in electron gases formed at interfaces between (111)-oriented KTaO3 and insulating overlayers of either EuO or LaAlO3. The superconducting transition temperature, as high as 2.2 kelvin, is about one order of magnitude higher than that of the LaAlO3/SrTiO3 system. Notably, similar electron gases at KTaO3 (001) interfaces remain normal down to 25 millikelvin. The critical field and current-voltage measurements indicate that the superconductivity is two-dimensional. In EuO/KTaO3 (111) samples, a spontaneous in-plane transport anisotropy is observed before the onset of superconductivity, suggesting the emergence of a distinct “stripe”-like phase, which is also revealed near the critical field. [1]: /lookup/doi/10.1126/science.aba5511
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/314089
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Changjiang Liu,Xi Yan,Dafei Jin,et al. Two-dimensional superconductivity and anisotropic transport at KTaO₃ (111) interfaces[J]. Science,2021.
APA	Changjiang Liu.,Xi Yan.,Dafei Jin.,Yang Ma.,Haw-Wen Hsiao.,...&Anand Bhattacharya.(2021).Two-dimensional superconductivity and anisotropic transport at KTaO₃ (111) interfaces.Science.
MLA	Changjiang Liu,et al."Two-dimensional superconductivity and anisotropic transport at KTaO₃ (111) interfaces".Science (2021).