Theory for low-dimensional quantum materials
·Surface & Interface Modeling
·Massive Manipulation & Artificial Creation
Recent publications
Distance-dependent magnetization modulation induced by inter-superatomic interactions in Cr-doped Au6Te12Se8 dimers
Chin. Phys. B, DOI:10.1088/1674-1056/ad8625 (2024) Yurou Guan (官雨柔), Nanshu...
Coexistence of ferroelectricity and antiferroelectricity in 2D van der Waals multiferroic
Nature Communications 15, 8616 (2024) Yangliu Wu, Zhaozhuo Zeng, Haipeng Lu,...
Real-space topology-engineering of skyrmionic spin textures in a van der Waals ferromagnet Fe3GaTe2
Nano Letters, DOI:10.1021/acs.nanolett.4c04031 (2024) / arXiv:2407.16924 Shuo...
Discovery and manipulation of van der Waals polarons in Sb2O3 ultrathin molecular crystal
J. Am. Chem. Soc., DOI:10.1021/jacs.4c04450 (2024) ZhiHao Zhang, Linlu Wu,...
Conversion of chirality to twisting via sequential one-dimensional and two-dimensional growth of graphene spirals
Nature Materials 23, 331–338 (2024). Zhu-Jun Wang#,*, Xiao Kong#, Yuan Huang#,...
Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers
Nature Communications 14, 6320 (2023). Le Lei#, Jiaqi Dai#, Haoyu Dong#,...
Recent News
万翰升获中学生英才计划国家级年度优秀学生称号
季威研究组指导的中学生万翰升在英才计划中脱颖而出,在2023年度英才计划评议中获得全国优秀的殊荣
六名成员参加“第四届团簇科学与原子制造学术研讨会”
2023年4月21-23日,中国人民大学物理学院季威教授携刘南舒博士后以及郭的坪、伍琳璐、官雨柔、戴佳琦等四名博士生赴西安参加了第四届“团簇科学与原子制造学术研...
2023 CZH-JW joint spring group meeting on Low-D Physics
2023年2月18日,中国人民大学物理学系程志海、季威研究组联合举办了2023年春季联合闭门学术交流会。来自2个研究组的24位成员,包括11位报告人,线下参加了...
See small, think big
Believe in seeing
- Microscopes empower human beings the capability of seeing nanostructures. We are interested in modeling those nanostructures being seen using a STM, nc-AFM or STEM. Interplay of those nanostructure with probes, e.g. a STM tip or electron beams, is of paramount importance, modeling of which is one of our missions.
- We, working closely with our experimental collaborators, observed the world’s first images of hydrogen bonding (Science 2013) and N…N quasi-bonding (Nat. Nanotech. 2018). The latter also verifies that the hydrogen bonding was indeed detected in the Science work.
At van der Waals gaps
- It was believed that van der Waals (vdW) interactions do not appreciably modify electronic structures of materials. However, we recently found significant wave function overlaps at inter-block regions (known as vdW gaps) of low-dimensional materials, called covalent-like quasi-bonding, which helps predict or explain many layer-dependent bandgaps, magnetism and electrical polarizations .
- We recently uncovered a few magnetic coupling mechanisms across their vdW gaps in e.g. CrI3 (PRB 2019), CrSe2 (PRB 2020 & Nat. Mater. 2021), CrTe2 (PRB 2020 & Nat. Communi. 2022), NiI2 and CrSBr, and found an OOP ferroelectricity in a MoS2/WS2 bilayer (Science 2022).
Atomic Electronics
- Moore’s law is a visionary guideline that keeps transistors evolving in the past over 60 years. As the channel length approaches the atomic scale, now it is 12 nm (tens of atoms) in IBM or Samsung’s 2 or 3 nm CMOS techniques, many of us believe that the atomicscale is the smallest sizescale that our devices, with novel functionalities, can work properly.
- We are dedicated to explore and propose novel functionalities of atomic devices, with moving the position or changing the state of an individual atom (small cluster).
- We proposed the world’s smallest electret and demonstrated its device functionality in a Gd@C82 devices (Nat. Nanotech. 2020).
Group Leader
Ji, Wei
Dr. Ji, Wei
Professor of Physics
Rm. 205A, Physics Bldg. Zhongguancun North Campus, RUC
wji@ruc.edu.cn
+86-10-62515597
senier researcher
Wang, Cong
Dr. Wang, Cong
Research Assoc. Prof.
Rm. 209, Physics Bldg.
Zhongguancun North Campus, RUC
wc_phys@ruc.edu.cn
+86-10-62517997
Post-doctoral fellow
Liu, Nanshu
Dr. Liu, Nanshu
Postdoctoral Fellow
Rm. 209, Physics Bldg. Zhongguancun North Campus, RUC
liuns@ruc.edu.cn
+86-10-62517997
PhD student
Wu, Linlu
Ms. Wu, Linlu
PhD student (P4)
Rm. 206, Physics Bldg.
Zhongguancun North Campus, RUC
wulinlu@ruc.edu.cn
+86-10-62517997