Ruohan Wang^1,3, Jiarui Li^1,3, Yaoju Tarn^1,2, Eun Kyo Ko^1,2, Vivek Thampy⁸, Chun Lin⁸, Makoto Hashimoto⁸, Donghui Lu⁸, Young S. Lee^1,3, Thomas P. Devereaux^1,4,9, Chunjing Jia⁵, Harold Y. Hwang^1,2, and Zhi-Xun Shen^1,2,3,4,§

• ¹Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
• ²Departments of Applied Physics, Stanford University, Stanford, California 94305, USA
• ³Departments of Physics, Stanford University, Stanford, California 94305, USA
• ⁴Geballe Laboratory for Advanced Materials, Department of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
• ⁵Department of Physics, University of Florida, Gainesville, Florida 32611, USA
• ⁶Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
• ⁷Stanford Institute for Theoretical Physics, Stanford University, Stanford, California 94305, USA
• ⁸Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
• ⁹Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA

• ^*These authors contributed equally to this work.
• ^†Contact author: bwang87@stanford.edu
• ^‡Present address: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China.
• ^§Contact author: zxshen@stanford.edu