Emergence of high-temperature superconductivity at the interface of two Mott insulators

被引：11

作者：

Ju, Lele ^{[1
,2
]}

Ren, Tianshuang ^{[1
,2
]}

Li, Zhu ^{[3
]}

Liu, Zhongran ^{[3
]}

Shi, Chuanyu ^{[1
,2
]}

Liu, Yuan ^{[1
,2
]}

Hong, Siyuan ^{[1
,2
]}

Wu, Jie ^{[4
,5
]}

Tian, He ^{[3
,6
]}

Zhou, Yi ^{[7
,8
,9
,10
,11
]}

Xie, Yanwu ^{[1
,2
,12
]}

机构：

[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Interdisciplinary Ctr Quantum Informat, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Ctr Electron Microscope, Hangzhou 310027, Peoples R China

[4] Westlake Univ, Sch Sci, Key Lab Quantum Mat Zhejiang Prov, Hangzhou 310024, Peoples R China

[5] Westlake Inst Adv Study, Inst Nat Sci, Hangzhou 310024, Peoples R China

[6] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450052, Peoples R China

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

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

[9] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[10] Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing 100190, Peoples R China

[11] Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China

[12] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ELECTRIC-FIELD CONTROL; FE; NI; CO;

D O I：

10.1103/PhysRevB.105.024516

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Interfacial superconductivity has manifested itself in various types of heterostructures: band insulator-band insulator, band insulator-Mott insulator, and Mott insulator-metal. We report the observation of high-temperature superconductivity (HTS) in a complementary and long-expected type of heterostructures, which consists of two Mott insulators, La2CuO4 (LCO) and PrBa2Cu3O7 (PBCO). By carefully controlling oxidization condition and selectively doping CuO2 planes with Fe atoms, which suppress superconductivity, we found that the superconductivity arises at the LCO side and is confined within no more than two unit cells (similar to 2.6 nm) near the interface. A phenomenon of "overcome the Fe barrier" will show up if excess oxygen is present during growth. Some possible mechanisms for the interfacial HTS have been discussed, and we attribute HTS to the redistribution of oxygen.

引用

页数：6

共 31 条

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