Two-dimensional superconductivity and anisotropic transport at KTaO3 (111) interfaces

被引：192

作者：

Liu, Changjiang ^{[1
]}

Yan, Xi ^{[1
,2
,3
,4
]}

Jin, Dafei ^{[5
]}

Ma, Yang ^{[6
]}

Hsiao, Haw-Wen ^{[7
]}

Lin, Yulin ^{[5
]}

Bretz-Sullivan, Terence M. ^{[1
]}

Zhou, Xianjing ^{[5
]}

Pearson, John ^{[1
]}

Fisher, Brandon ^{[5
]}

Jiang, J. Samuel ^{[1
]}

Han, Wei ^{[6
]}

Zuo, Jian-Min ^{[7
]}

Wen, Jianguo ^{[5
]}

Fong, Dillon D. ^{[1
]}

Sun, Jirong ^{[3
,4
,8
]}

Zhou, Hua ^{[2
]}

Bhattacharya, Anand ^{[1
]}

机构：

[1] Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[5] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[6] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China

[7] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[8] Univ Jinan, Spintron Inst, Jinan 250022, Shandong, Peoples R China

来源：

SCIENCE | 2021年 / 371卷 / 6530期

基金：

中国国家自然科学基金;

关键词：

ANTIVORTEX PAIR DISSOCIATION; TRANSITION; TEMPERATURE; GRAPHENE; DENSITY; FILMS;

D O I：

10.1126/science.aba5511

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：716 / +

页数：18

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