Education / Experience:
| 2020-Present: | Director of CHEXS, Cornell University |
| 2012 - 2020: | Staff Scientist, CHESS, Cornell University |
| 2010 - 2012: | Director's Fellow and Argonne Scholar, Advanced Photon Source, Argonne National Lab |
| 2004 - 2010: | PhD in Physics, McMaster University, Hamilton, ON, Canada |
| 2000 - 2004: | BSc. Physics, University of Waterloo, Waterloo, ON, Canada |
Research interests:
Quantum physics of materials, disordered structures, diffuse scattering, REXS, magnetism, unconventional superconductivity, charge density waves, critical phenomena, phonons, spin waves, single crystals, thin films, low temperatures, large magnetic fields.
Selected Publications:
Unconventional chiral charge order in kagome superconductor KV3Sb5
Yu-Xiao Jiang, Jia-Xin Yin, M Michael Denner, Nana Shumiya, Brenden R Ortiz, Gang Xu, Zurab Guguchia, Junyi He, Md Shafayat Hossain, Xiaoxiong Liu, Jacob Ruff, Linus Kautzsch, Songtian S Zhang, Guoqing Chang, Ilya Belopolski, Qi Zhang, Tyler A Cochran, Daniel Multer, Maksim Litskevich, Zi-Jia Cheng, Xian P Yang, Ziqiang Wang, Ronny Thomale, Titus Neupert, Stephen D Wilson, M Zahid Hasan
Nature Materials 20, 1353-1357 (2021); https://doi.org/10.1038/s41563-021-01034-y
The relation of local order to material properties in relaxor ferroelectrics
Matthew J Krogstad, Peter M Gehring, Stephen Rosenkranz, Raymond Osborn, Feng Ye, Yaohua Liu, Jacob PC Ruff, Wenzhi Chen, Justin M Wozniak, Haosu Luo, O Chmaissem, Z-G Ye, Daniel Phelan
Nature Materials 17, 718–724 (2018); https://doi.org/10.1038/s41563-018-0112-7
Spontaneous gyrotropic electronic order in a transition-metal dichalcogenide>
Su-Yang Xu, Qiong Ma, Yang Gao, Anshul Kogar, Alfred Zong, Andrés M Mier Valdivia, Thao H Dinh, Shin-Ming Huang, Bahadur Singh, Chuang-Han Hsu, Tay-Rong Chang, Jacob PC Ruff, Kenji Watanabe, Takashi Taniguchi, Hsin Lin, Goran Karapetrov, Di Xiao, Pablo Jarillo-Herrero, Nuh Gedik
Nature 578, 545–549 (2020); https://doi.org/10.1038/s41586-020-2011-8
Real-space imaging of periodic nanotextures in thin films via phasing of diffraction data
Ziming Shao, Noah Schnitzer, Jacob Ruf, Oleg Yu Gorobtsov, Cheng Dai, Berit H Goodge, Tiannan Yang, Hari Nair, Vlad A Stoica, John W Freeland, Jacob P Ruff, Long-Qing Chen, Darrell G Schlom, Kyle M Shen, Lena F Kourkoutis, Andrej Singer>
Proceedings of the National Academy of Sciences 120 (28) e2303312120 (2023); https://doi.org/10.1073/pnas.2303312120
Harnessing interpretable and unsupervised machine learning to address big data from modern X-ray diffraction
Jordan Venderley, Krishnanand Mallayya, Michael Matty, Matthew Krogstad, Jacob Ruff, Geoff Pleiss, Varsha Kishore, David Mandrus, Daniel Phelan, Lekhanath Poudel, Andrew Gordon Wilson, Kilian Weinberger, Puspa Upreti, Michael Norman, Stephan Rosenkranz, Raymond Osborn, Eun-Ah Kimn>
Susceptibility anisotropy in an iron arsenide superconductor revealed by X-ray diffraction in pulsed magnetic fields
JPC Ruff, J-H Chu, H-H Kuo, RK Das, H Nojiri, IR Fisher, Z Islam
Phys. Rev. Lett. 109, 027004 (2012); https://doi.org/10.1103/PhysRevLett.109.027004