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RIXS Program

Resonant inelastic x-ray scattering (RIXS) spectroscopy provides direct information about elementary excitations, such as crystal field splitting, charge transfer, and excitations in spin, charge, orbital, and lattice degrees of freedom. RIXS systems also collect conventional x-ray absorption spectroscopy (XAS) and x-ray emission spectroscopy (XES), which measure unoccupied and occupied electronic structure, respectively. These excitations and electronic states fundamentally define all the novel chemical and physical properties of energy materials for specific functionalities and quantum materials with strong electronic correlations.

The RIXS Program at the ALS manages several RIXS systems covering a wide range of instrumentation and science: full-energy-range fast mapping of RIXS (mRIXS) spectra, various in situ/operando RIXS, XAS and XES capabilities (wetRIXS), and high-efficiency momentum-resolved RIXS (qRIXS). Additionally, two high-resolution RIXS beamlines—AMBER for energy materials research and QERLIN for quantum materials research—are under construction/commissioning. These current and future RIXS projects will excel in the areas of quantum materials, energy materials, catalysis, and chemistry for research in both practical materials and fundamental science.

Beamlines

Personnel

ALS Staff

Jinghua Guo

Senior Scientist, Program Lead

Per-Anders Glans-Suzuki

Research Scientist

Wanli Yang

Senior Scientist

Zengqing Zhuo

Research Scientist

Doctoral and Postdoctoral Researchers

  • Honghe Ding
    ALS Collaborative Postdoctoral Fellow (2024-2025), University of California, Santa Cruz
    Exploring the interfacial chemistry in sulfide-based solid-state batteries by soft and tender x-ray spectroscopies under operating conditions

  • Gihyeok Lee
    Postdoctoral Researcher (2020-2025)
    Oxygen redox reactions in battery cathodes

  • Yonghee Lee
    Postdoctoral Researcher (2025-2027)

  • Jialu Li
    Postdoctoral Researcher (2023-2025), Energy Frontier Research Center (EFRC): Reconfigurable Electronic Materials Inspired by Nonlinear Neuron Dynamics (REMIND)

  • Franklin Liou
    Postdoctoral Researcher (2025-2027)

  • Tianying Liu
    ALS Doctoral Fellow in Residence (2024-2025), Boston College
    Time-resolved detection of water oxidation intermediates on Ir dinuclear heterogeneous catalyst photoelectrodes by soft x-ray spectroscopies

Program Alumni

  • Emma Anquillare
    Doctoral Researcher (2017-2021), Boston University

  • Yu-Jen Chen
    ALS Visiting Scholar (2016-2017)

  • Zhangzhang Cui
    ALS Visiting Student (2015-2016)

  • Lingzhe Fang
    NSF-INTERN visiting student (2021), Northern Illinois University
    XAS/RIXS of catalytic systems

  • Alex Frano, Assistant Professor, UC San Diego
    Postdoctoral Researcher (2014-2016)

  • Bingmei Feng
    ALS Visiting Student (2014-2015)

  • Xuefei Feng, Staff Scientist, National Synchrotron Radiation Laboratory (China), University of Science and Technology of China

  • Wei Guo
    ALS Visiting Ph.D. Student (2019-2020), Dalian University of Technology

  • Shang-Hsien Hsieh
    ALS Visiting Student (2017-2018)

  • Yang Ha, Research Scientist, Molecular Biophysics & Integrated Bioimaging Division, Berkeley Lab
    ALS Postdoc (2018-2023), DOE Vehicle Technologies Office (VTO) project
    Soft x-ray spectroscopy of cation-disordered electrode materials

  • Wencheng Huang
    ALS Doctoral Fellow in Residence (2018-2019), Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences

  • Nan Jiang
    AP Postdoc (2019-2021), University of Nevada, Las Vegas

  • Jaemyung Kim, National Institute for Materials Science, Japan
    ALS Visiting Scholar (2016-2017)

  • Min-Jae Kim
    ALS Collaborative Postdoctoral Fellow (2021-2024), Hydrogen Materials Advanced Research Consortium (HyMARC)

  • Zachary Lebens-Higgins
    Doctoral Researcher (2018-2019)

  • Eli Diego Kinigstein
    Postdoctoral Researcher (2021-2023)
    Ultrahigh-throughput x-ray spectroscopy for materials discovery in energy and chemical science

  • Hui Li
    Postdoctoral Researcher (2019-2020), Joint Center for Energy Storage Research (JCESR)
    Multivalent-ion solvation structure and charge transfer process

  • Qinghao Li, Professor, Qingdao University
    ALS Visiting Student (2015-2017)

  • Qingtian Li
    Visiting Ph.D. Student, ShanghaiTech University

  • Peng Liu
    ALS Visiting Student (2014-2015)

  • Xiaosong Liu, Professor, ShanghaiTech University
    LDRD Postdoctoral Researcher (2012-2014)

  • Yi-Sheng Liu, Research Scientist, Sigray, Inc.
    ALS Project Scientist (2016-2020)

  • Johannes Mahl
    ALS Doctoral Fellow in Residence (2016-2017)

  • Lin Miao, Professor, Southeast University, China
    ALS Collaborative Postdoctoral Fellow (2015-2017)

  • Kaiqi Nie
    ALS Visiting Student (2013-2015)

  • Paul Olalde-Velasco, Assistant Professor, Universidad Autónoma Metropolitana Iztapalapa
    ALS Visiting Student and Postdoc (2009-2013)

  • Ruimin Qiao, Senior Systems Engineer, Liminal
    Postdoctoral Researcher (2012-2017)

  • Guoxi Ren
    ALS Visiting Student (2018-2019)

  • Subhayan Roychoudhury
    LDRD Postdoc, Molecular Foundry, Berkeley Lab

  • Nicholas Russo
    DOE SCGSR Doctoral Fellow (2021-2022), Boston University
    XAS/RIXS of nanoparticle size effects on charge density wave molybdenum bronzes

  • Shawn Sallis, Process Engineer, Lam Research
    ALS Collaborative Postdoctoral Fellow (2017-2019), Binghamton University
    ALS Doctoral Fellow in Residence (2016-2017), Binghamton University

  • Yu-Cheng Shao, Assistant Research Scientist, National Synchrotron Radiation Research Center (Taiwan)
    ALS Collaborative Postdoctoral Fellow (2017-2020), University of Houston

  • Minami Tani
    Visiting student (2024), Tokyo University of Science
    XAS and RIXS of Yb-Doped CeO2 on c-Al2O3 and YSZ substrates

  • James Thorne
    ALS Doctoral Fellow in Residence (2016-2017), Boston College

  • Lauren Judith Vallez
    DOE SCGSR Doctoral Fellow (2021), Stanford University
    XAS/RIXS of electrode/electrolyte interface during electrochemical water oxidation to hydrogen peroxide

  • Hsiao-Tsu Wang
    ALS Visiting Student (2015-2017)

  • Chenghao Wu, Research Scientist, Lam Research
    Postdoctoral Researcher (2015-2017)

  • Jinpeng Wu
    ALS Collaborative Postdoctoral Fellow (2019-2020), Stanford University

  • Jue Wu
    ALS Visiting Student (2018-2019)

  • Yujian Xia
    ALS Visiting Student (2016-2017)

  • Yan Xu
    ALS Visiting Student (2016-2018)

  • Yong Xu
    ALS Visiting Postdoc (2015-2016)

  • Feipeng Yang
    ALS Collaborative Postdoctoral Fellow (2019-2020), University of Akron
    JCESR: Multivalent-ion solvation structure and charge transfer process

  • Yifan Ye
    ALS Collaborative Postdoctoral Fellow (2015-2017), Tsinghua University

  • Wasif Zaheer
    ALS Visiting Ph.D. Student (2018-2019), Texas A&M University
    Elucidating fundamental mechanisms of fluoride-ion insertion in low-dimensional ferrous antimonite

  • Liang Zhang, Professor, Soochow University
    Postdoctoral Researcher (2016-2018)

  • Yang Zhao, Assistant Professor, University of Western Ontario
    ALS Collaborative Postdoctoral Fellow (2020-2021), University of Western Ontario

  • Zengqing Zhuo, Research Scientist, ALS
    Postdoctoral Researcher (2021-2024), Hydrogen Materials Advanced Research Consortium (HyMARC)
    ALS Doctoral Fellow in Residence (2015-2017), Peking University