Theory for low-dimensional quantum materials
·Surface & Interface Modeling
·Massive Manipulation & Artificial Creation
Recent publications
Efficient energy transfer in a hybrid organic-inorganic van der Waals heterostructure
Science Advances 11, eadw3969 (2025) Xiaoqing Chen#, Huijuan Zhao#, Ruixiang...
Anisotropic Etching Patterns in 2D Cr5Te8 Nanosheets and Their Arduous Saturation Magnetization
Crystal Growth & Design (2025), DOI:10.1021/acs.cgd.5c00094 Hanxiang Wu,...
Tunable altermagnetism via interchain engineering in parallel-assembled atomic chains
Editors' Suggestion Phys. Rev. B 112, L041404 (2025); arXiv:2508.17352(2025)...
Ferromagnetism and correlated insulating states in monolayer Mo33Te56
Nature Communications 16, 3084 (2025); arXiv:2307.06001 (2024). Zemin Pan#,...
Evidence of Ferroelectricity in an Antiferromagnetic Vanadium Trichloride Monolayer
Science Advances 11, eado6538 (2025); arXiv:2404.13513 (2024) Jinghao Deng#,...
Si-CMOS Compatible Synthesis of Wafer-Scale 1T-CrTe2 with Step-Like Magnetic Transition
Advanced Materials 37, 202414845 (2025) Jiwei Liu#, Cong Wang#, Yuwei Wang,...
Recent News
研究组论文“Kagome electronic states in gradient-strained untwisted graphene bilayers”入选《Nanoscale Horizons》当期封面文章
近日,物理学院季威教授研究组联合深圳大学孔祥华副教授研究组在Nanoscale Horizons发表题为“Kagome electronic states in gradient-strained untwisted graphene bilayers” 的通讯论文 ,并被选为当期的封面论文[Nanoscale Horiz., 2025,10, 1956-1964]。
季威研究组参加中国化学会第一届全国表界面科学会议
2025年5月9日至12日,中国人民大学物理学院季威教授与研究组五名在读博士生(戴佳琦、王人宏、刘泽宇、张宗钦、李文考)及五名原研究组博士生毕业生(孔祥华、王聪...
季威研究组合作发现单层笼目材料新关联物态
近期,物理学院季威研究团队与武汉大学合作,成功合成单层Mo33Te56材料,获得了了近费米能级的电子平带,发现了平带电子演化导致的磁性与关联绝缘态。论文发表在《自然·通讯》上,为量子材料设计和表征测量提供了新思路与视角。
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