Background Information: 

Dr. Ruan is an Assistant Professor and Ph.D. Advisor at the Eastern Institute of Technology, Ningbo. He obtained his Ph.D. from Nanjing University in 2019 and subsequently conducted postdoctoral research at the University of California, Berkeley, and Lawrence Berkeley National Laboratory. His research focuses on theoretical studies of light-matter interactions, topological states, and correlated electronic states in condensed matter physics, with an emphasis on developing efficient numerical methods. He has made several innovative contributions in predicting topological quantum materials and advancing many-body theories and computational methods for nonlinear optical responses. Dr. Ruan is a member of the development team for the electronic structure calculation code BerkeleyGW, where he serves as a key contributor to the nonlinear optics and time-dependent GW modules. Dr. Ruan has published many papers in leading journals such as PRL, PNAS, Nature, Nature Communications, Nano Letters, and PRB, with the most-cited first-author paper receiving over 260 citations. He has been invited to deliver talks at prestigious international electronic structure calculation conferences, including the Berkeley Excited States Conference (BESC) and the Electronic Structure Workshop. He has received several awards, including the Special Prize from the Collaborative Innovation Center of Advanced Microstructures (2016), among others.

Ruan Group Website: https://www.physruan.com

Research Field:

1. Quantum geometry, topological electronic structures, and their effects on optics and quantum transport;

2. Exciton physics, unconventional magnetism, and correlated electronic states in 2D materials and twisted systems;

3. Dynamics of laser-driven phonons, excitons, magnons, and other quasiparticles; theoretical spectroscopy of quantum materials;

4. Developing first-principles computational methods for the above topics, incorporating theoretical techniques such as density functional theory (DFT), many-body perturbation theory (e.g., GW and Bethe-Salpeter equations), and non-equilibrium Green's functions.

Educational Background:

2014.09-2019.09, Ph.D. (Theoretical Physics), Nanjing University, School of Physics

2010.09-2014.06, Bachelor’s (Physics), Sun Yat-sen University, School of Physics

Work Experience:

2025.03-Present: Assistant Professor, Eastern Institute of Technology, Ningbo

2019.10-2025.02: Postdoctoral Researcher, University of California, Berkeley

Representative Works:

General Information

Google Scholar：

https://scholar.google.com/citations?user=WGX8OzIAAAAJ&hl=en

ORCID:

https://orcid.org/0009-0008-9759-7216

Representative Works (* refers to the corresponding author)

1. J. Ruan, Z. Li, C. S. Ong, S. G. Louie, Optically controlled single-valley exciton doublet states with tunable internal spin structures and spin magnetization generation. Proc. Natl. Acad. Sci. 120, e2307611120 (2023).

2. J. Ruan, Y.-H Chan, S. G. Louie, Exciton enhanced nonlinear optical responses in monolayer h-BN and MoS2: Insight from first-principles exciton-state coupling formalism and calculations. Nano Lett. 24, 15533 (2024).

3. J. Ruan, S.-K. Jian, D. Zhang, H. Yao, H. Zhang, S.-C. Zhang, D. Xing, Ideal Weyl Semimetals in the Chalcopyrites CuTlSe2, AgTlTe2, AuTlTe2, and ZnPbAs2. Phys. Rev. Lett. 116 (2016).

4. J. Ruan, S.-K. Jian, H. Yao, H. Zhang, S.-C. Zhang, D. Xing, Symmetry-protected ideal Weyl semimetal in HgTe-class materials. Nat. Commun. 7, 111368 (2016).

5. H. Wang, J. Ruan, H. Zhang, Non-Hermitian nodal-line semimetals with an anomalous bulk-boundary correspondence. Phys. Rev. B. 99 (2019).

6. S. Song, T. Yu, W. Tang, Z. Xu, Y. He, J. Ruan, T. Kojima, W. Hu, F. Giessibl, H. Sakaguchi, S. G. Louie, J. Lu, Janus graphene nanoribbons with localized states on a single zigzag edge. Nature 637, 580 (2025).