Erasable and recreatable two-dimensional electron gas at the heterointerface of SrTiO3 and a water-dissolvable overlayer

被引：27

作者：

Han, Kun ^{[1
]}

Hu, Kaige ^{[2
,3
]}

Li, Xiao ^{[3
,4
]}

Huang, Ke ^{[1
]}

Huang, Zhen ^{[5
,6
]}

Zeng, Shengwei ^{[5
,6
]}

Qi, Dongchen ^{[7
,8
]}

Ye, Chen ^{[1
]}

Yang, Jian ^{[1
]}

Xu, Huan ^{[9
]}

Ariando, Ariando ^{[5
,6
]}

Yi, Jiabao ^{[10
]}

Lu, Weiming ^{[11
]}

Yan, Shishen ^{[11
]}

Wang, X. Renshaw ^{[1
,9
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore

[2] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China

[3] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[4] Nanjing Normal Univ, Sch Phys & Technol, Ctr Quantum Transport & Thermal Energy Sci, Nanjing 210023, Jiangsu, Peoples R China

[5] Natl Univ Singapore, Dept Phys, Singapore 117411, Singapore

[6] Natl Univ Singapore, NUSNNI Nanocore, Singapore 117411, Singapore

[7] Queensland Univ Technol, Sch Chem Phys & Mech Engn, ARC Ctr Excellence Future Low Energy Elect Techno, Brisbane, Qld 4001, Australia

[8] La Trobe Univ, La Trobe Inst Mol Sci, Dept Chem & Phys, Melbourne, Vic 3086, Australia

[9] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[10] Univ Newcastle, Sch Engn, Global Innovat Ctr Adv Nanomat, Callaghan, NSW 2308, Australia

[11] Univ Jinan, Spintron Inst, Sch Phys & Technol, Jinan 250022, Shandong, Peoples R China

来源：

SCIENCE ADVANCES | 2019年 / 5卷 / 08期

基金：

新加坡国家研究基金会; 中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

HETEROSTRUCTURES; LOCALIZATION; TRANSITION; ADSORPTION; INTERFACES; SURFACES; MOBILITY;

D O I：

10.1126/sciadv.aaw7286

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：

While benefiting greatly from electronics, our society also faces a major problem of electronic waste, which has already caused environmental pollution and adverse human health effects. Therefore, recyclability becomes a must-have feature in future electronics. Here, we demonstrate an erasable and recreatable two-dimensional electron gas (2DEG), which can be easily created and patterned by depositing a water-dissolvable overlayer of amorphous Sr3Al2O6 (a-SAO) on SrTiO3 (STO) at room temperature. The 2DEG can be repeatedly erased or recreated by depositing the a-SAO or dissolving in water, respectively. Photoluminescence results show that the 2DEG arises from the a-SAO-induced oxygen vacancy. Furthermore, by gradually depleting the 2DEG, a transition of nonlinear to linear Hall effect is observed, demonstrating an unexpected interfacial band structure. The convenience and repeatability in the creation of the water-dissolvable 2DEG with rich physics could potentially contribute to the exploration of next generation electronics, such as environment-friendly or water-soluble electronics.

引用

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