Experimental Condensed Matter Physics — X-ray Spectroscopy — Quantum Materials — Strongly Correlated Materials — Interfaces

Research Summary
My research interests span two interrelated areas in experimental condensed matter physics: (1) depth-resolved x-ray spectroscopic and scattering probes of electronic structure and (2) femtosecond electronic structure and spin dynamics. In particular, my research group is focusing on the development of new static and time-resolved synchrotron and FEL-based x-ray techniques and applying these techniques to depth-resolved studies of novel materials, buried interfaces, and multilayer structures.

Education
Ph.D. Physics, University of California, Davis

Selected Publications

• J. R. Paudel, M. Terilli, T.-C. Wu, J. D. Grassi, A. M. Derrico, R. K. Sah, M. Kareev, F. Wen, C. Klewe, P. Shafer, A. Gloskovskii, C. Schlueter, V. N. Strocov, J. Chakhalian, and A. X. Gray, Direct experimental evidence of tunable charge transfer at the LaNiO3/CaMnO3 ferromagnetic interface, Phys. Rev. B 108, 054441 (2023).
• Modulation-Doping a Correlated Electron Insulator, D. Mondal, S. Mahapatra, A. M. Derrico, R. Rai, J. R. Paudel, C. Schlueter, A. Gloskovskii, R. Banerjee, A. Hariki, F. M. F. DeGroot, D. D. Sarma, A. Narayan, P. Nukala, A. X. Gray, and N. P. B. Aetukuri, Nature Comm. 14, 6210 (2023).
• A. Arab, X. Liu, O. Köksal, W. Yang, R. U. Chandrasena, S. Middey, M. Kareev, S. Kumar, M.-A. Husanu, Z. Yang, L. Gu, V. N. Strocov, T.-L. Lee, J. Minar, R. Pentcheva, J. Chakhalian, and A. X. Gray, Electronic structure of a graphene-like artificial crystal of NdNiO3, Nano Lett. 19, 8311 (2019).
• M. Golalikhani, Q. Lei, R. U. Chandrasena, L. Kasaei, H. Park, J. Bai, P. Orgiani, J. Ciston, G. Sterbinsky, D. A. Arena, P. Shafer, E. Arenholz, B. Davidson, A. J. Millis, A. X. Gray, and X. X. Xi, Nature of the metal-insulator transition in few-unit-cells-thick LaNiO3 films, Nature Comm. 9, 2206 (2018).
• R. U. Chandrasena, C. L. Flint, W. Yang, A. Arab, S. Nemšák, M. Gehlmann, V. B. Özdöl, F. Bisti, K. D. Wijesekara, J. Meyer-Ilse, E. Gullikson, E. Arenholz, J. Ciston, C. M. Schneider, V. N. Strocov, Y. Suzuki, and A. X. Gray, Depth-resolved charge reconstruction at the LaNiO3/CaMnO3 interface, Phys. Rev. B 98, 155103 (2018).

Awards

• 2021   Humboldt Research Fellowship, Alexander von Humboldt Foundation
• 2018   DOE Early Career Award, U.S. Department of Energy
• 2015   ARO Young Investigator Program (YIP) Award, U.S. Army Research Office
• 2013   Young Scientist Award, SPring-8 User Community, Japan

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