X-ray Diffraction Data Investigating Density Wave in Nickelates collected at CHESS

Overview This repository contains data links for High Dynamic Range Mapping, including both raw and reduced 3D reciprocal space maps for La2NiO3F2 and La2NiO4 from QM2. In addition, an example of one of the detailed data analysis Jupyter notebooks is also attached. The experiments were conducted on different substrates: DyScO3, NdGaO3, and LaAlO3, within the temperature range of 100 K to 300 K at various cooling rates. The experiments took place at the QM2 beamline of the Cornell High Energy Synchrotron Source (CHESS) in March and June 2025. The corresponding CHESS beamline scientist overseeing the project is Suchismita Sarker. Data Structure and Analysis The data is organized with a prefix that identifies the principal investigator (PI), beamtime request ID, and beamline cycle: mundy-4346-a, mundy-4346-c. The JSON file includes several subdirectories for the data stored on the CHESS server: `data_location_raw` and `data_location_reduced`. The `data_location_raw` folder contains SPEC files and .cbf files. The `data_location_reduced` folder contains files with .nxs extensions, where data analysis has been performed using NxRefine tools (https://nexpy.github.io/nxrefine/). Contact information For any questions or further information, please contact: Suchismita Sarker : [e-mail] Acknowledgments Research is primarily supported by the National Science Foundation with award DMR-2323970. This work is based on research conducted at the Center for High-Energy X-ray Sciences (CHEXS), which is supported by the National Science Foundation (BIO, ENG and MPS Directorates) under award DMR-2342336. Research is primarily supported by the National Science Foundation with award DMR-2323970. Please cite appropriately if used in your work.