People & Research Topic

  • Home
  • People & Research Topic
Yi Tseng

Yi Tseng Assistant Professor

  • Experience

    2025/8 ~ present
    Assistant Professor, Institute of Physics, National Yang Ming Chiao Tung University

    2024/6 ~ 2025/5
    Postdoctoral Researcher, Free Electron Laser in Hamburg (FLASH), Deutsches Elektronen Synchrotron (DESY)

    2021/11 ~ 2024/4
    Postdoctoral Associate, Department of Physics, Massachusetts Institute of Technology

    Research Expertise

    In Spectroscopy of Novel Materials Laboratory led by Yi Tseng, the main research goal is to probe and control the electronic behavior, namely the electronic ground states and various elementary excitations out of fundamental degrees of freedom (i.e. spin, charge, orbital, lattice). Particularly, we primarily focus on the fundamental understanding and developments for application potential of strongly correlated electronic systems (e.g. transition-metal oxides, multiferroics, etc) and low-dimensional quantum magnetism (e.g. 2D van der Waals materials). The major research approach features synchrotron-based X-ray spectroscopy and scattering, also extending to time-domain X-ray techniques by free-electron laser.

  • Research Expetise

    • Y. Wei*, Y. Tseng*, H. Elnaggar, W. Zhang, T. C. Asmara, E. Paris, G. Domaine, V. N. Strocov, L. Testa, V. Favre, M. Di Luca, M. Banerjee, A. R. Wildes, F. M. F. de Groot, H. M. Rønnow, and T. Schmitt*, “Spin-orbital excitations encoding the magnetic phase transition in the van der Waals antiferromagnet FePS3”, npj Quantum Materials 10, 61 (2025).
    • Y. Tseng*, C. A. Occhialini*, Q. Song, P. Barone, S. Patel, M. Shankar, R. Acevedo-Esteves, J. Li, C. Nelson, S. Picozzi, R. Sutarto, and R. Comin*, “Shear-mediated stabilization of spin spiral order in multiferroic NiI2”, Advanced Materials 37, 2417434 (2025).
    • C. A. Occhialini*, Y. Tseng*, H. Elnaggar, Q. Song, M. Blei, S. A. Tongay, V. Bisogni, F. M. F. de Groot, J. Pelliciari, and R. Comin*, “Nature of excitons and their ligand-mediated delocalization in nickel dihalide charge-transfer insulators”, Physical Review X 14, 031007 (2024).
    • Y. Tseng*, E. Paris, K. P. Schmidt, W. Zhang, T. C. Asmara, R. Bag, V. N. Strocov, S. Singh, J. Schlappa, H. M. Rønnow, and T. Schmitt*, “Momentum-resolved spin-conserving two-triplon bound state and continuum in a cuprate ladder”, Communications Physics 6, 138 (2023).
    • Y. Tseng*, J. Thomas, W. Zhang, E. Paris, P. Puphal, R. Bag, G. Deng, T. C. Asmara, V. N. Strocov, S. Singh, E. Pomjakushina, U. Kumar, A. Nocera, H. M. Rønnow, S. Johnston*, and T. Schmitt*, “Crossover of high-energy spin fluctuations from collective triplons to localized magnetic excitations in Sr14-xCaxCu24O41 ladders”, npj Quantum Materials 7, 92 (2022).
    • E. Paris*, Y. Tseng, E. M. Pärschke, W. Zhang, M. H. Upton, A. Efimenko, K. Rolfs, D. E. McNally, L. Maurel, M. Naamneh, M. Caputo, V. N. Strocov, Z. Wang, D. Casa, C. Schneider, E. Pomjakushina, K. Wohlfeld, M. Radović, and T. Schmitt*, “Strain engineering of the charge and spin-orbital interactions in Sr2IrO4”, Proceedings of the National Academy of Sciences 117, 24764-24770 (2020).
    • C. J. Butler*, Y. Tseng, C.-R. Hsing, Y.-M. Wu, R. Sankar, M.-F. Wang, C.-M. Wei*, F.-C. Chou, and M.-T. Lin*, “Observation of surface superstructure induced by systematic vacancies of topological Dirac semimetal Cd3As2”, Physical Review B 95, 081410R (2017).