Fully Optical Modulation of the Two-Dimensional Electron Gas at the Al2O3/SrTiO3Interface

Niu，Wei1,2; Fang，Yue Wen3,7; Liu，Ruxin2; Wu，Zhenqi1; Chen，Yongda2; Gan，Yulin4; Zhang，Xiaoqian5; Zhu，Chunhui6; Wang，Lixia1; Xu，Yongbing1,2; Pu，Yong1; Chen，Yunzhong4; Wang，Xuefeng2

2022

10.1021/acs.jpclett.2c00384

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

1948-7185

Two-dimensional electron gas (2DEG) formed at the heterointerface between two oxide insulators hosts plenty of emergent phenomena and provides new opportunities for electronics and photoelectronics. However, despite being long sought after, on-demand properties controlled through a fully optical illumination remain far from being explored. Herein, a giant tunability of the 2DEG at the interface of Al2O3/SrTiO3 through a fully optical gating is discovered. Specifically, photon-generated carriers lead to a delicate tunability of the carrier density and the underlying electronic structure, which is accompanied by the remarkable Lifshitz transition. Moreover, the 2DEG can be optically tuned to possess a maximum Rashba spin-orbit coupling, particularly at the crossing region of the sub-bands with different symmetries. First-principles calculations essentially well explain the optical modulation of Al2O3/SrTiO3. Our fully optical gating opens a new pathway for manipulating emergent properties of the 2DEGs and is promising for on-demand photoelectric devices.

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China[11904174,61874060,61911530220,"U1932159",61822403,11874203] ; Natural Science Foundation of Jiangsu Province["BK20190729","BK20181388","19KJA180007"] ; NUPTSF["NY219024","NY220203","NY217118"] ; Natural Science Foundation of the Jiangsu Higher Education Institutions of China[19KJB510047] ; China Postdoctoral Science Foundation["2020M680726","2021M701590"] ; Natural Science Foundation of Universities of Jiangsu Province[TJ219008]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000787083700016

AMER CHEMICAL SOC

20221511962064

Alumina ; Aluminum oxide ; Calculations ; Electronic structure ; Light modulation ; Optical signal processing

Light/Optics:741.1 ; Inorganic Compounds:804.2 ; Mathematics:921

2-s2.0-85127898899

Scopus

1.New Energy Technology Engineering Laboratory of Jiangsu Province,School of Science,Nanjing University of Posts and Telecommunications,Nanjing,210023,China
2.Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials,School of Electronic Science and Engineering,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing,210093,China
3.Laboratory for Materials and Structures and Tokyo Tech World Research Hub Initiative (WRHI),Tokyo Institute of Technology,Yokohama,4259 Nagatsuta, Midori-ku, Kanagawa,226-8503,Japan
4.Beijing National Laboratory for Condensed Matter,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China
5.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.College of Physics,Hebei Normal University,Shijiazhuang,050024,China
7.NYU-ECNU Institute of Physics,New York University Shanghai,Shanghai,200122,China

Niu，Wei,Fang，Yue Wen,Liu，Ruxin,et al. Fully Optical Modulation of the Two-Dimensional Electron Gas at the Al2O3/SrTiO3Interface[J]. Journal of Physical Chemistry Letters,2022,13(13):2976-2985.

Niu，Wei.,Fang，Yue Wen.,Liu，Ruxin.,Wu，Zhenqi.,Chen，Yongda.,...&Wang，Xuefeng.(2022).Fully Optical Modulation of the Two-Dimensional Electron Gas at the Al2O3/SrTiO3Interface.Journal of Physical Chemistry Letters,13(13),2976-2985.

Niu，Wei,et al."Fully Optical Modulation of the Two-Dimensional Electron Gas at the Al2O3/SrTiO3Interface".Journal of Physical Chemistry Letters 13.13(2022):2976-2985.