翟晓芳课题组介绍
2024年春季学期:PHYS2127《薄膜生长》
教材:Thin Film Deposition: Principles and Practice,by Donald Smith, McGraw-Hill Education
本课程主要讲解薄膜制备方法和制备原理。通过讲授薄膜制备过程中各个环节的物理原理,使学生理解并掌握薄膜制备技术的理论,理解薄膜制备的关键要素;通过讲授两种经典的薄膜制备技术-分子束外延和脉冲激光沉积,使学生学会薄膜沉积的技术要领,理解两种生长方式各自的技术特点和优劣势。通过本课程的学习,为后续从事材料物理、凝聚态物理等专业研究打下基础。
助教:刘佳 liujia3@@shanghaitech.edu.cn
新型低维量子材料和器件研究非常重要,是发展低能耗、高速度自旋电子学和新型存算一体化量子器件的重要方向之一,也是突破已有材料和器件功能壁垒的前沿领域。我们主要通过激光分子束外延,操纵单个原子层的堆叠“lego”结构,在单原子基础上发展人工结构新材料,研究关联电子体系在其界面结构中的物性表现和深层原理,探索具有超小尺寸、超快响应等迫切需求的低维量子材料和器件,为解决“后摩尔时代”器件发展的瓶颈问题服务。
我们的研究方向包括以下方面:(1)在原子层级别研究关联电子体系界面新奇效应,通过界面对称性破缺、关联相互作用、强自旋轨道耦合等物理效应的竞争与协作,构建界面超导、二维电子气、二维界面磁性等界面电、磁特性,理解其物理图像,并对其进行调控;(2)研究二维自站立薄膜的制备技术,通过柔性衬底制备磁电柔性材料和器件,并将其与硅基半导体结合,开展关联量子材料的应用研究;(3)通过同步辐射、中子反射等大科学装置研究手段,探测界面结构、成分、能带结构和磁结构,解析界面新奇效应的物理机制。
图1:激光分子束外延设备
本课题组诚聘博士后研究员和研究生,待遇优厚,工作环境优越,欢迎有志于在材料物理、器件物理等领域开展最前沿研究的学生学者加入!有意者请直接与翟晓芳邮件联系。
J Liu, F Ye, M Bao, H Fan, X Liu, Z Zhang, Z Gu, L Cheng*, X Zhai*, Confinement‐Enhanced Rashba Spin–Orbit Coupling at the LaAlO3/KTaO3 Interface via LaAlO3 Thickness Control, Physica Status Solidi (RRL), 2200441 (2023)
Q Lu#, X Lei#, J Fu, Q Wang, X Mao, L Cheng, X Zhai*, H Zeng*, Magnetic proximity effect in ultrathin freestanding WS2/LaMnO3 van der Waals heterostructures, AIP Adv. 13, 055115 (2023).
Qinwen Lu,# Zhiwei Liu,# Qun Yang,# Hui Cao, Purnima Balakrishnan, Qing Wang, Long Cheng, Yalin Lu, Jian-Min Zuo, Hua Zhou, Patrick Quarterman, Shin Muramoto, Alexander J. Grutter, Hanghui Chen*, and Xiaofang Zhai*, Engineering Magnetic Anisotropy and Emergent Multidirectional Soft Ferromagnetism in Ultrathin Freestanding LaMnO3 Films, ACS Nano 16, 7580–7588 (2022)
Q Lu, Q Wang, Q Yang, L Cheng, X Zhai,Superflexibility in single-crystalline manganite oxide membranes with gigantic bending curvature and strain, Appl. Phys. Lett. 121, 171601 (2022)
Qinwen Lu, # Yun Cheng,# Lijun Wu,# Hongli Guo,# Fengfeng Qi, Haijuan Zhang, Junxiao Yu, Qixin Liu, Qing Wang, Genhao Liang, Jie Chen, Yalin Lu, Jie Zhang,Dao Xiang,* Jin Zhao,* Yimei Zhu* & Xiaofang Zhai*, Photoinduced evolution of lattice orthorhombicity and conceivably enhanced ferromagnetism in LaMnO3 membranes, NPJ Quant. Mater. 7, 47 (2022). DOI: 10.1038/s41535-022-00456-4
自站立薄膜制备和UED实验原理示意图
G. Liang, L. Cheng*, J. Zha, H. Cao, J. Zhang, Q. Liu, M. Bao, J. Liu, X. Zhai*, In-situ quantification of the surface roughness for facile fabrications of atomically smooth thin films, Nano Res. 15, 1654-1659 (2021).
H. Cao, H. Guo, Y. Shao, Q. Liu, X. Feng, Q. Lu, Z. Wang, A. Zhao, A. Fujimori, Y. Chuang, H. Zhou*, and X. Zhai*, Realization of Electron Antidoping by Modulating the Breathing Distortion in BaBiO3, Nano Lett. 21, 3981−3988 (2021).
BaBiO3-δ (0≤δ≤0.25)晶体结构和能带结构变化示意图
Z. Cui, A. Grutter, H. Zhou, H. Cao, Y. Dong, D. Gilbert, J. Wang, Y.-S. Liu, J. Ma, Z. Hu, J. Guo, J. Xia, B. Kirby, P. Shafer, E. Arenholz, H. Chen*, X. Zhai*, Y. Lu. Correlation-Driven Eightfold Magnetic Anisotropy in a Two-Dimensional Oxide Monolayer, Sci. Adv. 6, eaay0114 (2020).
可用于多态储存的单原子层薄膜新型8重磁各项异性
D. Meng#, H. Guo#, Z. Cui, C. Ma, J. Zhao, J. Lu, H. Xu, Z. Wang, X. Hu, Z. Fu, R. Peng, J. Guo, X. Zhai*, G. Brown, R, Knize, Y, Lu,* “Strain-induced high-temperature perovskite ferromagnetic insulator”, Proc. Natl. Acad. Sci. USA 115(12), 2873-2877 (2018).
应力、氧空位含量共同调控磁性的三维相图
H. Xu, X. Zhai*, Z. Wang, Z. Cui, Z. Fu, Y. Lu*, “An epitaxial synaptic device made by a band-offset BaTiO3/Sr2IrO4 bilayer with high endurance and long retention”,Appl. Phys. Lett. 114, 102904 (2019).
基于磁性半导体Sr2IrO4的类脑突触芯片
X. Zhai*, L. Cheng, Y. Liu*, C. M. Schlepütz, S. Dong*, H. Li, X. Zhang, S. Chu, Li. Zheng, J. Zhang, A. Zhao, H. Hong, A. Bhattacharya,J. N. Eckstein,C.Zeng,'Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices”, Nat. Commun. 5, 4283 (2014).
X. Zhai, C. Mohapatra, A. B. Shah, J.G. Wen, A. Bhattacharya, J. M. Zuo, and J. N. Eckstein, “New optical absorption bands in atomic layer superlattices”, Adv. Mater. 22, 1136 (2010).
成龙,助理研究员 | |||
刘佳 liujia3@shanghaitech.edu.cn | 保明睿 baomr@shanghaitech.edu. cn | 王晴 wangqing2@shanghaitech. edu.cn | 叶飞 yefei@shanghaitech.edu.cn |
许敏辉 xumh@shanghaitech.edu.cn | 范海洋 fanhy@shanghaitech.edu.cn | 章子恒 zhangzh4@shanghaitech.edu.cn | |