Evidence of the nontrivial Berry phase at ?-Al2O3/SrTiO3 heterointerfaces

doi:10.1063/5.0093903

	Evidence of the nontrivial Berry phase at ?-Al2O3/SrTiO3 heterointerfaces
	Niu, Wei 3,4; Wu, Zhenqi 3,4; Chen, Yongda 5; Gan, Yulin 6; Chen, Yequan 5; Hu, Hongqi 3,4; Zhang, Xiaoqian 1; Xu, Yongbing 3,4,5; Zou, Youming 2; Pu, Yong 3,4
刊名	APPLIED PHYSICS LETTERS
	2022-09-05
卷号	121
ISSN号	0003-6951
DOI	10.1063/5.0093903
通讯作者	Niu, Wei(weiniu@njupt.edu.cn) ; Pu, Yong(puyong@njupt.edu.cn) ; Wang, Xuefeng(xfwang@nju.edu.cn)
英文摘要	The nontrivial Berry phase in correlated oxide heterostructures has been highly attractive due to the Rashba spin-orbit interactions originating from the inversion symmetry breaking at the heterointerfaces. Despite the theoretically predicated nontrivial pi Berry phase in Rashba systems, its experimental detection among all Rashba oxide interfaces remains elusive. Here, we report a nontrivial Berry phase at the interface between gamma-Al2O3 and SrTiO3 as evidenced by the quantum oscillations. Analysis of transport properties under the high magnetic field up to 32 T reveals the weak anti-localization (WAL) effect and Shubnikov-de Haas (SdH) oscillations. Both the WAL effect and the nontrivial pi Berry phase extracted from the SdH oscillations manifest the significance of the Rashba spin-orbit coupling in gamma-Al2O3/SrTiO3. Physical quantities concerning the Fermi surface, such as effective mass, scattering time, etc., are experimentally accessed as well. Our work provides insights into the nontrivial Berry phase in correlated oxide interfaces.
资助项目	National Natural Science Foundation of China[11904174] ; National Natural Science Foundation of China[11874203] ; National Natural Science Foundation of China[61822403] ; National Natural Science Foundation of China[61874060] ; National Natural Science Foundation of China[U1932159] ; National Natural Science Foundation of China[61911530220] ; Natural Science Foundation of Jiangsu Province[BK20190729] ; Natural Science Foundation of Jiangsu Province[BK20181388] ; NUPTSF[NY220203] ; Jiangsu Specially-Appointed Professor Program ; Natural Science Foundation of Universities of Jiangsu Province[TJ219008] ; China Postdoctoral Science Foundation[2020M680726] ; China Postdoctoral Science Foundation[2022T150287] ; China Postdoctoral Science Foundation[2021M701590]
WOS关键词	2-DIMENSIONAL ELECTRON-GAS ; HIGH-MOBILITY ; INTERFACE ; OSCILLATIONS
WOS研究方向	Physics
语种	英语
出版者	AIP Publishing
WOS记录号	WOS:000852574000003
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; NUPTSF ; Jiangsu Specially-Appointed Professor Program ; Natural Science Foundation of Universities of Jiangsu Province ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128950]
专题	中国科学院合肥物质科学研究院
通讯作者	Niu, Wei; Pu, Yong; Wang, Xuefeng
作者单位	1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China 2.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme C, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China 3.Nanjing Univ Posts & Telecommun, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Peoples R China 4.Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Peoples R China 5.Nanjing Univ, Sch Elect Sci & Engn, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Nanjing 210093, Peoples R China 6.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Niu, Wei,Wu, Zhenqi,Chen, Yongda,et al. Evidence of the nontrivial Berry phase at ?-Al2O3/SrTiO3 heterointerfaces[J]. APPLIED PHYSICS LETTERS,2022,121.
APA	Niu, Wei.,Wu, Zhenqi.,Chen, Yongda.,Gan, Yulin.,Chen, Yequan.,...&Wang, Xuefeng.(2022).Evidence of the nontrivial Berry phase at ?-Al2O3/SrTiO3 heterointerfaces.APPLIED PHYSICS LETTERS,121.
MLA	Niu, Wei,et al."Evidence of the nontrivial Berry phase at ?-Al2O3/SrTiO3 heterointerfaces".APPLIED PHYSICS LETTERS 121(2022).