戴佳琦 博士生 Dai, Jiaqi (P5 Student)
戴佳琦，2022级博士生
办公地点：北园物理楼206
电子邮箱：daijiaqi@ruc.edu.cn
电 话：+86-10-62517997
传 真：+86-10-62517997
研究方向
低维与表面
In-plane epitaxy-strain-tuning intralayer and interlayer magnetic coupling in CrSe2 and CrTe2 monolayers and bilayers
Phys. Rev. B 106, L081401 (2022)
Linlu Wu#, Linwei Zhou#, Xieyu Zhou, Cong Wang*, and Wei Ji*
Abstract
Mismatched lattice constants at a van der Waals epitaxy interface often introduce in-plane strains to the lattice of the epitaxial layer, termed epitaxy strain, wherein the strains do not follow the intralayer Poisson’s relation. In this study, we obtained the magnetic phase diagrams of CrSe2 and CrTe2 mono- and bilayers under epitaxy strain up to 8%, as predicted using density functional theory calculations. The magnetic phase diagrams indicate that the in-plane epitaxy strain manipulates either the intra- or interlayer magnetism. The in-plane strain varies the interlayer distance, defined using an interlayer Poisson’s ratio, which determines whether the interlayer magnetism follows a Bethe–Slater curve-like (BSC-like) or a reversed BSC-like behavior, depending on the in-plane magnetism. The tunability of the intralayer magnetism is a result of competing intralayer Cr–Cr superexchange interactions. A graphene substrate was introduced to examine the validity of our diagrams in practice. This study also afforded a tentative explanation on the previously reported magnetizations in CrSe2 and CrTe2 epitaxial mono- or bilayers under epitaxy strains, which had given rise to some controversy.
DOI:10.1103/PhysRevB.106.L081401
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乔婧思 博士 Qiao, Jingsi (Dr.)
王侣锦 博士 Wang, Lvjin (Ph.D)
基本信息
王侣锦：2018-2024 博士
2024年入职云南师范大学任讲师
教育经历
(1) 2018-09 至今, 中国人民大学, 理学院物理学系, 硕博连读，在读
(2) 2014-09 至 2018-06, 北京师范大学, 物理学系, 本科，理学学士
研究方向
利用第一性原理计算方法，结合部分实验现象，探索低维材料中的极性、磁性等物理性质
(1) 层状材料的面外铁电性
(2) 单分子驻极体
(3) 单原子吸附位置调控
(4) 铁电薄膜相变研究
(5) 滑移铁电
代表性论文
(1) Lukas Rogée†, Lvjin Wang†, Yi Zhang, Songhua Cai, Peng Wang, Manish Chhowalla*, Wei Ji* & Shu Ping Lau*.Ferroelectricity in untwisted heterobilayers of transition metal dichalcogenides,Science 376, 973-978 (2022)
伍琳璐 博士生 Wu, Linlu (P6 Student)
基本信息
伍琳璐：2020级博士生
办公地点：北园物理楼206
电子邮箱：wulinlu@ruc.edu.cn
电 话：+86-10-62517997
传 真：+86-10-62517887
邮 编：100872
教育经历
(1) 2018-09 至今, 中国人民大学, 物理学系, 硕博连读，在读
(2) 2014-09 至 2018-06, 中国人民大学, 物理学系, 本科，理学学士
研究方向
利用第一性原理计算方法，结合部分实验现象，探索低维材料及表面和界面体系的新奇物性及调控机制，包括：
(1) 超原子晶体中的相互作用及新奇电荷序
(2) 低维材料的磁学性质及其调控
(3) 低维体系的电子结构、声子、光学等性质的模拟和理解
(3) 表面和界面体系的电子结构及相互作用
代表性论文
(1) Luojun Du#*, Yanchong Zhao#, Linlu Wu#, Xuerong Hu#, Lide Yao, Yadong Wang, Xueyin Bai, Yunyun Dai, Jingsi Qiao, Md Gius Uddin, Xiaomei Li, Jouko Lahtinen, Xuedong Bai, Guangyu Zhang, Wei Ji* & Zhipei Sun*, Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus, Nat. Commun 12, 4822 (2021)
(2) Shuya Xing#, Linlu Wu#, Zilu Wang#, Xu Chen#, Haining Liu, Shuo Han, Le Lei, Linwei Zhou, Qi Zheng, Li Huang, Xiao Lin, Shanshan Chen, Liming Xie, Xiaolong Chen, Hong-Jun Gao, Zhihai Cheng*, Jiangang Guo*, Shancai Wang* & Wei Ji*, Interweaving polar charge orders in a layered metallic super-atomic, Phys. Rev. X 12, 041034 (2022)
(3) Linlu Wu#, Linwei Zhou#, Xieyu Zhou, Cong Wang* & Wei Ji*, In-plane epitaxy-strain-tuning intralayer and interlayer magnetic coupling in CrSe2 and CrTe2 monolayers and bilayers, Phys. Rev. B 106, L081401 (2022)
(4) Jialei Miao#, Linlu Wu#, Zheng Bian, Qinghai Zhu, Tianjiao Zhang, Xin Pan, Jiayang Hu, Wei Xu, Yeliang Wang, Yang Xu, Bin Yu, Wei Ji, Xiaowei Zhang*, Jingsi Qiao*, Paolo Samorì*, and Yuda Zhao*, A “Click” Reaction to Engineer MoS2 Field-Effect Transistors with Low Contact Resistance, ACS Nano, 16, 12, 20647–20655 (2022)
(5) Yanping Guo#, Linlu Wu#, Jinghao Deng#, Linwei Zhou, Wei Jiang, Shuangzan Lu, Da Huo, Jiamin Ji, Yusong Bai, Xiaoyu Lin, Shunping Zhang, Hongxing Xu, Wei Ji* & Chendong Zhang*, Band alignment and interlayer hybridization in monolayer organic/WSe2 heterojunction, Nano Res. 15, 1276–1281 (2022)
(6) Yu Wang#, Linlu Wu#, Zheng Wei, Zijia Liu, Peng Cheng, Yiqi Zhang, Baojie Feng, Guangyu Zhang, Wei Ji* & Kehui Wu*, Real-space detection and manipulation of two-dimensional quantized well states in few-layered MoS2, Phys. Rev. B 105, L081404 (2022)
(7) Zilu Wang#, Qiangwei Yin#, Shaohua Yan#, Linlu Wu#, Xuchuan Wu, Man Li, Wenhua Song, Qingxin Liu, Huan Ma, Wei Ji*, Hechang Lei* & Shancai Wang*, Three-dimensional charge density wave observed by angle-resolved photoemission spectroscopy in 1T−VSe2, Phys. Rev. B 104, 155134 (2021)
(8) Yanhui Hou#, Ziqiang Xu#, Yan Shao, Linlu Wu, Zhongliu Liu, Genyu Hu, Wei Ji*, Jingsi Qiao*, Xu Wu*, Hong-Jun Gao & Yeliang Wang*, Improving the band alignment at PtSe2 grain boundaries with selective adsorption of TCNQ, Nano Res. (2022)