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1992.09 - 1996.07, Bachelor's Degree, Beijing Normal University

1996.09 - 1998.12, Master's Degree, Beijing Normal University

1999.01 - 2000.07, Postgraduate, University of Southern California (USC)

2000.09 - 2004.05, Doctoral Degree, University of California, Los Angeles (UCLA)

2008.04 – Present, Professor, Department of Physics, Renmin University of China (Awarded as one of the "Top Ten Class Advisors" of the university in 2014)

200804 – 2008.10, Postdoctoral Researcher, Department of Physics, McMaster University (Canada)

2004.06- 2008.03, Assistant Researcher, Center for Superconductivity Research, University of Maryland (USA)

Research Projects

1. National Key Research and Development Program, 2023YFA1406500, Quantum Phase Transitions and State Construction of Low-Dimensional Quantum Magnetic Materials, 2023.12-2028.11, 20 million yuan, ongoing, principal investigator

2. Key Project of the National Natural Science Foundation of China, 12134020, Quantum Confinement and Deconfinement in Quantum Spin Liquid Materials with Strong Spin-Orbit Coupling, 2022.01-2026.12, 4.025 million yuan, ongoing, principal investigator

3. General Project of the National Natural Science Foundation of China, 51872328, Research on the Hydrogenation of Iron-Based Superconducting Materials by Ionic Liquids, 2019.01-2022.12, 620,000 yuan, completed, principal investigator

4. National Key Research and Development Program of the Ministry of Science and Technology, 2016YFA0300500, Research on Novel Quantum Effects and Their Manipulation in Quantum Spin Frustrated Systems and Spin Liquids, 2016-2021, 1.5 million yuan, completed, key participant

5. Pre-research Entrusted Project (Team Fund) of Renmin University of China, 15XNLQ07, Sample Synthesis and Property Research of Spin-Frustrated Magnetic Materials, 2015.01-2017.12, 1 million yuan, completed, principal investigator

6. Innovative Team of the Ministry of Education, Research on Novel Quantum Correlated Functional Materials of Rare Earth-Transition Metal Compounds and Their Unusual Quantum Effects, 2014.01-2016.12, completed, key participant

7. General Project of the National Natural Science Foundation of China, 11374364, Research on the Correlation between Structure, Magnetism and Superconductivity of Iron-Based Superconducting Materials, 2014.1-2017.12, 890,000 yuan, completed, principal investigator

8. Excellent Young Scientists Fund of the National Natural Science Foundation of China, 11222433, NMR Property Research of Correlated Electron Materials, 2013.01-2015.12, 1 million yuan, completed, principal investigator

9. Goal-Oriented Project of the Ministry of Science and Technology, 2011CBA00112, Research on High-Temperature Superconducting Materials and Physics, 2011.01-2015.12, 1.2 million yuan, completed, key participant

10. 973 Program of the Ministry of Science and Technology, 2010CB923004, Property Characterization of Novel Quantum Functional Systems and Material Exploration, 2010.01-2014.12, 1.2 million yuan, completed, key participant

11. General Project of the National Natural Science Foundation of China, 11074304, NMR Research on Hole-Doped and Phosphorus-Doped Iron-Based Superconducting Single Crystal Materials, 2011.01-2013.12, 540,000 yuan, completed, principal investigator

12. New Century Excellent Talents Support Program of the Ministry of Education, NCET-08-0546, 2008 - 2011, 300,000 yuan, completed, principal investigator

(1) Nuclear Magnetic Resonance (NMR) Studies of Strongly Correlated Electron Materials

The research directions of our group focus on novel quantum states, quantum phase transitions, and quantum critical behaviors in unconventional superconducting materials, low-dimensional and frustrated quantum magnetic materials. Many new types of condensed matter materials exhibit peculiar physical properties. The root cause lies in the extremely strong electron-electron Coulomb interactions in these systems. The spin, charge, and orbital degrees of freedom of electrons, as well as phonons, are coupled together, giving rise to complex properties with potential applications in sensing, storage, energy, quantum information, and quantum computing. Such systems are known as strongly correlated electron systems.

Condensed matter NMR, by means of hyperfine coupling, magnetic dipole coupling, and electric field gradient coupling between atomic nuclei and electrons, conducts sensitive microscopic explorations and studies of the electrical and magnetic properties of correlated electron materials. Its important applications include utilizing the site-selective, local, and bulk characteristics of NMR, and combining with modulation techniques such as variable temperature, variable magnetic field, and high pressure, to conduct research on crystal structures, magnetic structures, magnetic excitations, charge orders, superconductivity, and quantum phase transitions.

(2) Development of NMR Testing Techniques under Extreme Conditions

NMR research enables the reading and writing of the magnetic states of atomic nuclei using electromagnetic waves. It is widely applied in scientific research and application fields such as physics, biology and medicine, chemistry, and mineral exploration, and has won the Nobel Prize five times. Our laboratory develops a variety of experimental techniques, especially NMR under extreme conditions such as low temperature, high pressure, and high magnetic field. Currently, the laboratory has state-of-the-art international technical capabilities, including NMR combined with 30,000 atmospheres, 20 millikelvins, and 16 teslas; the internationally leading technology is NMR combined with 80,000 atmospheres, 1.5 K, and 10 teslas.

Yi Cui, Doctor, graduated in 2020 from Renmin University of China, Associate Professor

Long Ma, Doctor, graduated in 2015 from National High Magnetic Field Science Center (Hefei), Associate Researcher

Peng-Shuai Wang, Doctor, graduated in 2017 from a company, Engineer

Jia Dai, Doctor, graduated in 2016 from a company, Engineer

Ze Hu, Doctor, graduated in 2024 from Spallation Neutron Source (Dongguan), Postdoctoral Fellow

Shuo Li, Doctor, graduated in 2024 from Institute of Physics, Chinese Academy of Sciences, Postdoctoral Fellow

Cong Li, Doctor, graduated in 2024 in Beijing, Middle School Teacher

The research group has developed two internationally leading nuclear magnetic resonance (NMR) measurement technologies: one combining 30,000 atmospheres of pressure with dilution refrigeration, and the other combining 80,000 atmospheres of pressure with liquid helium refrigeration. In recent years, leveraging the advantages of NMR in position selectivity and low-energy magnetic detection, research has been conducted on the magnetic properties, superconducting mechanisms, and quantum phase transitions of correlated electron materials such as iron-based superconductors and spin-frustrated materials. The main focus is on the NMR-based physical property research of unconventional superconductors and quantum magnetic materials. To date, more than 70 SCI papers have been published, including 15 papers in Science, Physical Review Letters (PRL), Physical Review X (PRX), and Nature Communications (NC). 12 papers have received more than 100 citations each, and the H-index is 34. In 2012, the group was funded by the National Science Foundation for Excellent Young Scientists Project.

Representative Works in Recent Years

1) Low-Dimensional and Frustrated Quantum Magnetism and Quantum Critical Phenomena

(1) An experimental discovery of a quantum critical phenomenon that transcends the Landau theory paradigm: the deconfined quantum critical phenomenon (Science, 2023, Representative Paper 1. Click to view related introduction, as well as the recommended article by Prof. Frederic Mila in Journal of Condensed Matter and Materials Physics (JCCM)).

(2) At the transverse-field quantum critical point of the one-dimensional antiferromagnetic Ising material BaCo₂V₂O₈, quantum states with E₈ algebraic states were discovered (Physical Review Letters, 2021, Representative Paper 2. View the recommended article by Prof. Masaki Oshikawa in JCCM).

(3) Through research on triangular-lattice Ising antiferromagnetic materials, the first experimental evidence of the Berezinskii-Kosterlitz-Thouless (BKT) phase transition in magnetic materials was found (Nature Communications, 2020, Representative Paper 3).

(4) In the one-dimensional antiferromagnetic material SrCo₂V₂O₈, a one-dimensional Ising-type quantum critical point was achieved at low fields for the first time (Physical Review Letters, 2019, Representative Paper 4), opening up new avenues for further studies on its physical properties.

(5) For the spin-frustrated material α-RuCl₃, a phase diagram under magnetic fields was established for the first time, revealing that the magnetic field suppresses magnetic order and induces a quantum spin liquid state, and that this spin liquid state exhibits gapless Dirac-type fermionic excitations (Physical Review Letters, 2017, Representative Paper 6).

(6) Ba₈CoNb₆O₂₄ was studied first, and it was proposed that this material could be used as the first ideal two-dimensional triangular-lattice Heisenberg antiferromagnetic material for research. It was proposed that this material may have a quantum spin liquid state at zero field, and a quantum phase transition from magnetic order is induced under high magnetic fields [Physical Review Materials, 2018].

2) Superconducting Materials

(1) Through high-pressure nuclear magnetic resonance studies at dilution refrigeration temperatures, the striped magnetic structure of the FeSe superconducting material under high pressure was solved for the first time (Physical Review Letters, 2016, Representative Paper 7), promoting the establishment of a microscopic interaction model for this material and the understanding of its superconducting mechanism.

(2) The technique of ionic liquid hydrogenation was introduced into the research of iron-based superconductors. The electron-doping effect caused by hydrogenation increased the superconducting transition temperature of FeSe-based materials from 8.5 K to 42.5 K. High-sensitive hydrogen nuclear magnetic resonance measurements revealed unconventional superconducting properties, providing new ideas for electron doping and hydrogen nuclear magnetic resonance research (Science Bulletin, 2018, ESI highly cited, Representative Paper 5. View the recommended article by Prof. Hideo Hosono in Science Bulletin).

(3) Experimental results such as unconventional spin-singlet pairing (Physical Review Letters, 2011, Representative Paper 13), microscopic coexistence of superconductivity and magnetic order (Physical Review Letters, 2012, Representative Paper 9), and the correlation between spin fluctuations and the superconducting transition temperature (Physical Review Letters, 2013, Representative Paper 8) were observed in iron-based superconducting materials

Representative Papers

1. Proximate deconfined quantum critical point in SrCu2(BO3)2, Yi Cui#, Lu Liu#, Huihang Lin#, Kai-Hsin Wu, Wenshan Hong, Xuefei Liu, Cong Li, Ze Hu, Ning Xi, Shiliang Li, Rong Yu*, Anders W. Sandvik*, Weiqiang Yu*, Science 380, 1179 (2023). (Citations 48）

2. E8 Spectra of Quasi-One-Dimensional Antiferromagnet BaCo2V2O8 under Transverse Field, H. Zou , Y. Cui, X. Wang , Z. Zhang, J. Yang, G. Xu, A. Okutani, M. Hagiwara, M. Matsuda, G. Wang, Giuseppe Mussardo, K. Hódsági, M. Kormos, Z. He, S. Kimura,R. Yu, W. Yu*, Jie Ma*, and Jianda Wu*, PHYSICAL REVIEW LETTERS 127, 077201 (2021). (Citations 32）

3. Evidence of the Berezinskii-Kosterlitz-Thouless Phase in a Frustrated Magnet, Z. Hu#, Z. Ma#, Y.-D. Liao#, H. Li#, C. Ma, Y. Cui, Y. Shangguan, Z. Huang, Y. Qi*, W. Li*, Z. Y. Meng*, J. Wen*, and Weiqiang Yu*, Nature Communications 11, 5631 (2020).（Citations 65）

4. Quantum Criticality of the Ising-like Screw Chain Antiferromagnet SrCo2V2O8 in a Transverse Magnetic Field, Y. Cui, H. Zou, N. Xi, Zhangzhen He*, Y. X. Yang, L. Shu, G. H. Zhang, Z. Hu, T. Chen, Rong Yu, Jianda Wu* and Weiqiang Yu*, PHYSICAL REVIEW LETTERS 123, 067203 (2019). （Citations 40）

5. Protonation induced high-T-c phases in iron-based superconductors evidenced by NMR and magnetization measurements, Cui Yi#, Zhang Gehui, Li Haobo, Lin Hai, Zhu Xiyu, Wen Hai-Hu, Wang Guoqing, Sun Jinzhao, Ma Mingwei, Li Yuan, Gong Dongliang, Xie Tao, Gu Yanhong, Li Shiliang, Luo Huiqian, Yu Pu*, Yu Weiqiang*, Science Bulletin 63 ,11-16 (2018) （Citations 56）.

6. Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α−RuCl3, Jiacheng Zheng#, Kejing Ran#, Tianrun Li, Jinghui Wang, Pengshuai Wang, Bin Liu, Zheng-Xin Liu, B. Normand, Jinsheng Wen*, and Weiqiang Yu*, PHYSICAL REVIEW LETTERS 119, 227208 (2017) .（Citations 239）.

7. Pressure Induced Stripe-Order Antiferromagnetism and First-Order Phase Transition in FeSe, P. S. Wang, S. S. Sun, Y. Cui, W. H. Song, T. R. Li, Rong Yu, Hechang Lei, and Weiqiang Yu*, PHYSICAL REVIEW LETTERS 117, 237001 (2016)（Citations 82）.

8. Simultaneous Optimization of Spin Fluctuations and Superconductivity under Pressure in an Iron-Based Superconductor, G. F. Ji, J. S. Zhang, Long Ma, P. Fan, P. S. Wang, J. Dai, G. T. Tan, Y. Song, C. L. Zhang, Pengcheng Dai, B. Normand, and W. Yu*, PHYSICAL REVIEW LETTERS 111, 107004 (2013). (Citations 24)

9. Microscopic coexistence of superconductivity and antiferromagnetism in underdoped Ba(Fe1-xRux)2As2, L. Ma, G. F. Ji, Jia Dai, X. R. Lu, M. J. Eom, J. S. Kim, B. Normand, W. Yu*, PHYSICAL REVIEW LETTERS 109, 197002 (2012).（Citations 27）

10. 77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2, W. Yu*, L. Ma, J. B. He, D. M. Wang, T.-L. Xia, G. F. Chen, and W. Bao, PHYSICAL REVIEW LETTERS 106, 197001 (2011).（Citations 78）

11. Absence of superconductivity in single-phase CaFe2As2 under hydrostatic pressure, W. Yu, A. A. Aczel, T. J. Williams, S. L. Bud’ko, N. Ni, P. C. Canfield, and G. M. Luke, Phys. Rev. B 79, 020511 (R) (2009). (Citations 210)

12. Electron-lattice coupling and broken symmetries of the molecular salt (TMTTF)2SbF6, W. Yu, F. Zhang, F. Zamborszky, B. Alavi, A. Baur, C. A. Merlic, and S. E. Brown, Phys. Rev. B. 70, 121101(R) (2004).（Citations 103）

13.Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures, W. Yu, F. Zamborszky, J. D. Thompson, J. L. Sarrao, M. E. Torelli, Z. Fisk, and S. E. Brown, PHYSICAL REVIEW LETTERS 92, 086403 (2004).（Citations 75）