X XIE Group Quantum Matter Theory @ SJTU
γ₁ γ₂

XIE Group

Quantum Matter Theory

Topology · Correlation · Superconductivity · Quantum Geometry

Welcome to XIE Group

We are a theoretical condensed matter physics group at the School of Physics and Astronomy, Shanghai Jiao Tong University. Our research focuses on emergent quantum phenomena in low-dimensional quantum materials.

Current interests include unconventional superconductivity, topological phases, moire materials, Josephson physics, nonlinear optical and transport responses, and quantum geometric effects.

Ying-Ming Xie

PI Biography: Ying-Ming Xie (谢应明)

Ying-Ming Xie received his B.S. in Physics from Beijing Normal University in 2016 and his Ph.D. from the Hong Kong University of Science and Technology in 2021, under the supervision of Prof. Kam Tuen Law. During his Ph.D. study, he also collaborated with Prof. Patrick A. Lee at MIT.

He then carried out postdoctoral research at HKUST and RIKEN in the group of Prof. Naoto Nagaosa, and visited Prof. Jason Alicea's group at Caltech as a visiting postdoctoral researcher. He was selected for the National Excellent Young Scientists Fund Program (Overseas) in 2025. He joined the Institute of Condensed Matter Physics, School of Physics and Astronomy at SJTU in June 2026 as a tenure-track associate professor, PhD supervisor, and independent PI.

As of April 2026, he has published 31 papers with more than 1900 Google Scholar citations and an h-index of 21. He has more than 20 first-author or corresponding-author papers, including works in Nature Physics, Nature Materials, Physical Review Letters, PNAS, and Nature Communications.

Search profile: Ying-Ming Xie Google Scholar / yingming xie google scholar.

Research

We develop theory for symmetry, topology, correlation, and quantum geometry in experimentally relevant quantum materials.

  1. Low-dimensional correlated quantum systems, including low-dimensional unconventional superconductivity, correlated topology, density waves, and strongly correlated quantum phases.
  2. Topological superconductivity and topological quantum computation, including topological superconductivity, Majorana zero modes, non-Abelian quasiparticles, topological quantum computation, and superconducting Josephson junctions.
  3. Transport and control theory of quantum materials, including quantum transport, nonlinear optical responses, and quantum geometric effects.
Correlation, topology and geometry, and superconductors overlap diagram
Josephson junction research schematic

Research Highlights

Original research page
Photon-drag photovoltaic effect schematic with band geometry and optical setup

Photon Drag Photovoltaic Effect from Quantum Geometry

We showed how photon momentum and quantum geometry can generate photovoltaic responses even in centrosymmetric systems, providing a route to probe wavefunction geometry through optical transport.

PNAS 122, e2424294122 (2025)
Moiré Ising superconductor band splitting and orbital FFLO schematic

Orbital FFLO Pairing in Moiré Ising Superconductors

We proposed an orbital mechanism for finite-momentum pairing in moiré Ising superconductors, connecting orbital magnetic effects to FFLO physics and superconducting diode behavior.

Phys. Rev. Lett. 131, 016001 (2023)
Kramers nodal line metal band gap map

Kramers Nodal Line Metals

We identified Kramers nodal line metals protected by spin-orbit coupling and crystalline symmetries, revealing a route to robust band topology in quantum materials.

Nat. Commun. 12, 3064 (2021)
Quasi-one-dimensional supersolid with CDW and superconducting couplings schematic

Quasi-1D Supersolids and Strong Correlations

We study how superconducting and charge-density-wave orders coexist in coupled Luther-Emery liquids, providing a theoretical route toward quasi-one-dimensional supersolids.

Phys. Rev. Research 7, 023302 (2025)
Gate-defined topological Josephson junction device schematic Kekulé peaks for gate-defined topological Josephson junction

Gate-Defined Topological Josephson Junctions

We proposed electrically defined topological Josephson junctions in Bernal bilayer graphene, providing a route to engineer topological superconductivity and Majorana modes in a tunable two-dimensional material platform.

Phys. Rev. Lett. 131, 146601 (2023)
Spin-orbit-parity coupled superconductivity band structure and critical field figure

Spin-Orbit-Parity Coupled Superconductivity

We introduced spin-orbit-parity coupled superconductivity in topological monolayer WTe2, showing how crystalline symmetry, spin-orbit coupling, and pairing structure can produce unconventional superconducting phases.

Phys. Rev. Lett. 125, 107001 (2020)

Members

Students and Postdocs

Names will be added as the group grows.

Visitors and Alumni

This section will track visitors, collaborators, and former members.

Publications

Selected representative publications. For the full list, see Google Scholar and arXiv.

  1. Ying-Ming Xie and Naoto Nagaosa, Photon Drag Photovoltaic Effects and Quantum Geometric Nature, PNAS 122, e2424294122 (2025).
  2. Ying-Ming Xie, Yizhou Liu, and Naoto Nagaosa, Sliding Dynamics of Current-Driven Skyrmion Crystal and Helix in Chiral Magnets, Phys. Rev. Lett. 133, 096702 (2024).
  3. Zi-Ting Sun, Jin-Xin Hu, Ying-Ming Xie#, and K. T. Law#, Anomalous h/2e Periodicity and Majorana Zero Modes in Chiral Josephson Junctions, Phys. Rev. Lett. 133, 056601 (2024). # corresponding author.
  4. J. Diez-Merida, A. Diez-Carlon, S. Y. Yang, Y.-M. Xie, X.-J. Gao, K. Watanabe, T. Taniguchi, X. Lu, K. T. Law, and Dmitri K. Efetov, Magnetic Josephson Junctions and Superconducting Diodes in Magic Angle Twisted Bilayer Graphene, Nat. Commun. 14, 2396 (2023). theoretical explanation/collaboration.
  5. Enze Zhang*, Ying-Ming Xie*, Yuqiang Fang*, Jinglei Zhang*, Xian Xu, Yi-Chao Zou, Pengliang Leng, Xue-Jian Gao, Yong Zhang, Linfeng Ai, Yuda Zhang, Zehao Jia, Shanshan Liu, Wei Zhao, Sarah J. Haigh, Xufeng Kou, Jinshan Yang, Fuqiang Huang, K. T. Law, Faxian Xiu, and Shaoming Dong, Spin-Orbit-Parity Coupled Superconductivity in Atomically thin 2M-WS2, Nat. Phys. 19, 106-113 (2023). * co-first author.
  6. Ying-Ming Xie, Étienne Lantagne-Hurtubise, Andrea F. Young, Stevan Nadj-Perge, and Jason Alicea, Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene, Phys. Rev. Lett. 131, 146601 (2023).
  7. Ying-Ming Xie and K. T. Law, Orbital Fulde-Ferrell pairing state in moire Ising superconductors, Phys. Rev. Lett. 131, 016001 (2023).
  8. Jin-Xin Hu, Zi-Ting Sun, Ying-Ming Xie#, and K. T. Law#, Josephson Diode Effect Induced by Valley Polarization in Twisted Bilayer Graphene, Phys. Rev. Lett. 130, 266003 (2023). # corresponding author.
  9. Ying-Ming Xie, Cheng-Ping Zhang, Jin-Xin Hu, Kin Fai Mak, and K. T. Law, Valley-Polarized Quantum Anomalous Hall State in Moiré MoTe2/WSe2 Heterobilayers, Phys. Rev. Lett. 128, 026402 (2022).
  10. Ying-Ming Xie, Xue-Jian Gao, Xiao Yan Xu, Cheng-Ping Zhang, Jin-Xin Hu, and K. T. Law, Kramers nodal line metals, Nat. Commun. 12, 3064 (2021).
  11. Yong-Bin Choi*, Ying-Ming Xie*, Chui-Zhen Chen, Jinho Park, Su-Beom Song, Jiho Yoon, Bum Joon Kim, Takashi Taniguchi, Kenji Watanabe, Jonghwan Kim, Kin Chung Fong, Mazhar N. Ali, K. T. Law, and Gil-Ho Lee, Evidence of higher-order topology in multilayer WTe2 from Josephson coupling through anisotropic hinge states, Nat. Mater. 19, 974-979 (2020). * co-first author.
  12. Ying-Ming Xie, Benjamin T. Zhou, and K. T. Law, Spin-orbit-parity coupled superconductivity in topological monolayer WTe2, Phys. Rev. Lett. 125, 107001 (2020).

Ying-Ming Xie Google Scholar / arXiv / CV

News

06/2026 - XIE Group starts at Shanghai Jiao Tong University.

2026 - Topological altermagnetic Josephson junctions published in npj Quantum Materials.

2025 - Photon-drag photovoltaic effects and quantum geometry published in PNAS.

2025 - Invited talk on photodrag photovoltaic effect and quantum geometry at the low temperature conference.

Gallery

Selected moments from group life, seminars, conferences, and everyday research at XIE Group.

XIE Group @ SJTU
Group photos and campus moments
Seminars & Talks
Academic visits, invited talks, and workshops
Group Life
Team activities, meals, and informal moments

Opening

The group has strong funding support and welcomes motivated undergraduate students, graduate students, and postdocs interested in quantum condensed matter theory and computation.

Graduate Student Recruitment

The group plans to recruit 1-2 PhD or master students each year. Interested students are welcome to contact Prof. Xie by email for further discussion.

Postdoctoral Benefits

  • Excellent research conditions with sufficient and stable funding support.
  • Annual salary of RMB 300,000-400,000 before tax, with competitive performance-based supplements. Postdocs supported by national, Shanghai, or SJTU postdoctoral programs may receive additional benefits on top of the base package.
  • During the appointment, SJTU provides postdoctoral apartments or housing subsidies, and benefits including children's schooling support, medical care, social insurance, and Shanghai hukou support for the postdoc and family according to university and municipal policies.

How to Apply

Please send a CV.

yingming.xie@sjtu.edu.cn

Office: Science Laboratory Building Complex No. 1, Room 213, Minhang Campus, Shanghai Jiao Tong University.