Postdoctoral Scholars

Dr. Heonjoon Park

I joined the Shen group as a postdoctoral researcher in August 2025, supported by the Stanford Science Fellowship. I completed my undergraduate degree at Seoul National University before earning my PhD in Physics from the University of Washington, Seattle. During my PhD, I investigated interaction–driven topological phases in two-dimensional moiré materials, most notably the fractional quantum anomalous Hall effect. My current research uses microwave impedance microscopy (MIM) to visualize emergent electronic states in moiré semiconductors with nanoscale resolution. [Email]

Dr. Xirui Wang

I joined the Shen group as a postdoctoral researcher in November 2025, supported by the Urbanek and Chodorow postdoctoral fellowships. I completed my undergraduate study at Peking University. During my PhD at MIT, I worked on sliding ferroelectricity as well as orbital magnets in 2D materials. My current research uses scanning microwave impedance microscopy to study nanoscale dielectric response in topological quantum material systems.

[Email]

Dr. Qinda Guo

I joined the Shen group as a postdoctoral researcher in August 2024, after completing my PhD at KTH Royal Institute of Technology in Sweden. My doctoral work involved developing an HHG–based tr–ARPES facility as well as ARPES investigations of cuprate superconductors. My current research focuses on developing a time-resolved photoemission system using the state–of–the–art XFEL light source and momentum microscope, and performing relevant experiments with this platform. [Email]

Dr. Bai Yang Wang

I joined Shen group as a postdoctoral researcher in November 2023. I completed my undergraduate degree at University of Wisconsin–Madison before a PhD in Physics at Stanford University. In my PhD I combined pulsed laser deposition and low temperature transport measurement techniques to investigate the infinite–layer nickelate superconductors and developed in–situ strain tuning of freestanding cuprate membranes. My current research interest is to use oxide molecular beam epitaxy and spectroscopic methods to investigate the novel properties of various quantum materials. [Email]

Dr. Paulina Majchrzak

I joined the Shen group as a Stanford Energy Postdoctoral Fellow in September 2023. I completed my Masters degree in Chemical Physics at the University of Edinburgh, Scotland, in 2019, and my PhD degree at Aarhus University, Denmark, in 2023. During my PhD, I investigated non–equilibrium phenomena in novel low–dimensional materials and their functional devices. At Stanford, I am working towards developing in–operando spectroscopic methods for studying rechargeable battery cathodes. [Email]