44. Extreme domain wall speeds under ultrafast optical excitation, Rahul Jangid, Nanna Zhou Hagström, Meera Madhavi, Kyle Rockwell, Justin M. Shaw, Jefferey A. Brock, Matteo Pancaldi, Dario De Angelis, Flavio Capotondi, Emanuele Pedersoli, Hans T. Nembach, Mark W. Keller, Stefano Bonetti, Eric E. Fullerton, Ezio Iacocca, Roopali Kukreja, and Thomas J. Silva. Phys, Rev. Lett. 131, 256702 (2023).(link)
43. Photoinduced modification of optical properties of ferroelectric PZT thin films, Saeed Yousefi, Nelson Hua, Jugal Mehta, Jianheng Li, Loïc Guillemot, Geoffery Rippy, Louie Zhong, Richard D. Schaller, Thomas Maroutian, Kristoffer Haldrup, Sylvia Matzen, & Roopali Kukreja. MRS Communications (2023). (link)
42. Photoinduced structural recovery dynamics of rare-earth nickelate thin films Jugal Mehta, Scott Smith, Jianheng Li, Kenneth Ainslie, Nadia Albayati, Toyanath Joshi, Pooja Rao, Yu-Hsing Cheng, Spencer Jeppson, Rahul Jangid, Evguenia Karapetrova, Donald A. Walko, Haidan Wen, David Lederman, and Roopali Kukreja, Physical Review Materials 7, 096201 (2023) (link)
41. Behavior of soda-lime silicate glass under laser-driven shock compression up to 315 GPa, Meera Madhavi, Rahul Jangid, Joyce Christiansen-Salameh, Yu-Hsing Cheng, Pooja Rao, Jianheng Li, Surya Teja Botu, Spencer Jeppson, Jugal Mehta, Scott Smith, Jared T. Isobe, Sovanndara Hok, Rahul Saha, Eric Cunningham, Philip Heimann, Dimitri Khaghani, Hae Ja Lee, D. K. Spaulding, Danae N. Polsin, Arianna E. Gleason, Roopali Kukreja, Journal of Applied Physics 133, 175901 (2023) (link)
40. Discerning element and site-specific fluctuations of the charge-orbital order in Fe3O4 below the Verwey transition, Nelson Hua, Jianheng Li, Stjepan B. Hrkac, Andi Barbour, Wen Hu, Claudio Mazzoli, Stuart Wilkins, Roopali Kukreja, Eric E. Fullerton, and Oleg G. Shpyrko, Physical Review Materials 7, 014413 (2023) (link)
39. Symmetry dependent ultrafast manipulation of nanoscale magnetic domains, Nanna Zhou Hagström, Rahul Jangid, Meera, Diego Turnenne, Jeffrey Broack, Erik S. Lamb, Boyan Stoychev, Justine Schlappa, Natalia Gerasimova, Benjamin Van Kuiken, Rafel Gort, Laurent Mercadier, Loic Le Guyader, Andrey Samartsev, Andreas Scherz, Giuseppe Mercurio, Herman A. Durr, Alexander H. Reid, Monika Arora, Hans T. Nembach, Justin M. Shaw, Emmanuelle Jal, Eric E Fullerton, Mark W Keller, Roopali Kukreja, Stefano Bonetti, Thomas J Silva, Ezio Iacocca, Physical Review B 106, 2244424 (2022) (link)
38. Electromagnetic Origin of the Microwave Absorption Resonance of Fe3O4 Thin Films James Wampler, Nelson Hua, Roopali Kukreja, Juan Gabriel Ramirez, Ali C. Basaran, Eric E. Fullerton, Oleg Shpyrko, Ivan K. Schuller, Physical Review B 106, L060402 (2022) (link)
37. Megahertz-rate ultrafast X-ray scattering holographic imaging at the European XFEL Nanna Zhou Hagström et al. Journal of Synchrotron Radiatoion 29, 1454 (2022) (link)
36. Observation of Collective Molecular Dynamics in a Chalcogenide Glass: Results from X-ray Photon Correlation Spectroscopy Jianheng Li, Meera Madhavi, Spencer Jeppson, Louie Zhong, Eric M. Dufresne, Bruce Aitken, Sabyasachi Sen, Roopali Kukreja, Journal of Physical Chemistry Letters, 126, 28 (2022) (link)
35. Stimulated Resonant Inelastic X-ray Scattering in a Solid Daniel Higley, Zhao Chen, Martin Beye, Markus Hantschmann, Alexander Reid, Virat Mehta, Olag Hellwig, Georgi Dakovski, Ankush Mitra, Robin Engel, Timothy Maxwell, Yuanto Ding, Stefano Bonetti, Maximilian Bucher, Sebastian Carron Montero, Tyler Chase, Emmanuelle Jal, Roopali Kukreja, Tianmin Liu, Alexander Fohlisch, Hermann Durr, William Schlotter, Joachim Stohr, Communication Physics 5, 1 (2022) (link)
34. Capturing ultrafast magnetization phenomenon using femtosecond x-rays Spencer Jeppson and Roopali Kukreja, APL Materials 9, 100702 (2021) (link)
33. Understanding nanoscale structural distortions in Pb(Zr0.2Ti0.8)O3 by utilizing X-ray nanodiffraction and clustering algorithm analysis Joyce Christiansen-Salameh, Morris Yang, Geoffrey Rippy, Jianheng Li, Zhonghou Cai, Martin Holt, Guillaume Agnus, Thomas Maroutian, Philippe Lecoeur, Sylvia Matzen and Roopali Kukreja, Journal of Synchrotron Radiation 28, 207-213 (2021) (link) (Data, model and fits included in the publication can be accessed here, note that a free account for BOX would be needed)
32. Book Chapter, Nanoscale Magnetism by Roopali Kukreja and Hendrik Ohldag, 21st Century Nanoscience, Taylor & Francis, 2020 (link)
31. Domain fluctuations in a ferroelectric low-strain BaTiO3 thin film Jianheng Li, Louie Zhong, Rahul Jangid, Meera, Geoffery Rippy, Kenneth Ainslie, Chris Kohne, Arnoud S. Everhardt, Beatriz Noheda, Yugang Zhang, Andrei Fluerasu, Sylvia Matzen, and Roopali Kukreja, Physical Review Materials 4, 114409 (2020) (link) (Data, model and fits included in the publication can be accessed here, note that a free account for BOX would be needed)
30. Direct time-domain determination of electron-phonon coupling strengths in chromium J. Wingert, A. Singer, S.K.K. Patel, R. Kukreja, Matthieu J. Verstraete, Aldo H. Romero, V. Uhlír, S. Festersen, D. Zhu, J.M. Glownia, H. T. Lemke, S. Nelson, M. Kozina, K. Rossnagel, B.M. Murphy, O. M. Magnussen, E. E. Fullerton, & O. G. Shpyrko, Physical Review B 102, 041101 (2020) (link)
29. Dynamics at the crystal-melt interface in a supercooled chalcogenide liquid near the glass transition J. Li., R. Jangid, W. Zhu, C. Kohne, A. Fluerasu, Y. Zhang, S. Sen, & R. Kukreja, Scientific Reports 10, 5881 (2020) (link)
28. Structural and magnetic properties of FeCoCrMnSi mult-principal element alloy Rahul Jangid, Kenneth Ainslie, Roopali Kukreja, Journal of Materials Research 35, 981 (2020) Invited Feature Paper (link)
27. X-ray nanodiffraction studies of ionically-controlled nanoscale phase separation in cobaltites G. Rippy, L. Trinh, A.M. Kane, A.L. Ionin, M.S. Lee, R. V. Chopdekar, J.M. Christiansen-Salameh, D.A. Gilbert, A.J. Grutter, P.D. Murray, M. V. Holt, Z. Cai, K. Liu, Y. Takamura, R. Kukreja, Physical Review Materials 3, 082001 (2019) (link)
26. Controlling shape memory effects in NiTi thin films grown on Ru seed layer Kenneth Ainslie, Cory Knick, Gabriel Smith, Jianheng Li, Charles Troxel, Apurva Mehta, Roopali Kukreja, Sensors and Actuators: A. Physical 294, 139 (2019) (link)
25. Tuning ultrafast photoinduced strain in ferroelectric based devices S. Matzen, L. Guillemot, S. Patel, T. Maroutian, G. Agnus, H. Wen, A. DiChiara, D. Ravelosona, P. Lecoeur, O. Shpyrko, E. Fullerton, R.Kukreja, Advanced Electronic Materials 5, 1800709 (2019) (link)
24. Spin-current-mediated rapid magnon localisation and coalescence after ultrafast optical pumping of ferrimagnetic alloys E. Iacoca, T-M Li, A. H. Reid, Z. Fu, S. Ruta, P.W. Granitzka, E. Hal, S. Bonetti, A.X. Gray, C.E. Graves, R. Kukreja, Z. Chen, D.J. Higley, T. Chase, L. Le Guyader, K. Hirsch, H. Ohldag, W.F. Schlotter, G.L. Dakovski, G. Coslovich, M.C. Hoffmann, S. Carron, A. Tsukamoto, A. Kirilyuk, A.V. Kimel, Th. Rasing, J. Stöhr, R.F.L Evans, T. Ostler, R.W. Chantrell, M.A. Hoefer, T.J. Silva, H.A. Dürr, Nature Communications 10, 1756 (2019) (link)
23. Orbital domain dynamics in magnetite below the Verwey transition R. Kukreja, N. Hua, J. Ruby, A. Barbour, W. Hu, C. Mazzoli, S. Wilkins, E.F. Fullerton, O.G. Shpyrko, Physical Review Letters 121, 177601 (2018) (link)
22. Ultrafast Self-Induced X-Ray Transparency and Loss of Magnetic Diffraction Z. Chen, D.J. Higley, M. Beye, M. Hantschmann, V. Mehta, O. Hellwig, A. Mitra, S. Bonetti, M. Bucher, S. Carron, T. Chase, E. Jal, R. Kukreja, T. Liu, A.H. Reid, G.L. Dakovski, A. Föhlisch, W.F. Schlotter, H.A. Dürr, J. Stöhr, Physical Review Letters 121, 137403 (2018) (link)
21. Ultrafast terahertz field control of electronic and structural interactions in vanadium dioxide A. X. Gray, M. C. Hoffmann, J. Jeong, N. P. Aetukuri, D. Zhu, H. Y. Hwang, N. C. Brandt, H. Wen, A. J. Sternbach, S. Bonetti, A. H. Reid, R. Kukreja, C. Graves, T. Wang, P. Granitzka, Z. Chen, D. J. Higley, T. Chase, E. Jal, E. Abreu, M. K. Liu, T.-C. Weng, D. Sokaras, D. Nordlund, M. Chollet, R. Alonso-Mori, H. Lemke, J. M. Glownia, M. Trigo, Y. Zhu, H. Ohldag, J. W. Freeland, M. G. Samant, J. Berakdar, R. D. Averitt, K. A. Nelson, S. S. P. Parkin, and H. A. Dürr, Physical Review B 98, 045104 (2018) (link)
20. Nonequilibrium Phase Precursors during a Photoexcited Insulator-to-Metal Transition in V2O3 A. Singer, Juan Gabriel Ramirez, Ilya Valmianski, Devin Cela, Nelson Hua, Roopali Kukreja, James Wingert, Olesya Kovalchuk, James M. Glownia, Marcin Sikorski, Matthieu Chollet, Martin Holt, Ivan K. Schuller and Oleg G. Shpyrko, Physical Review Letters 120, 207601 (2018) (link)
19. Phase coexistence and pinning of charge density waves by interfaces in chromium Singer, S. K. K. Patel, V. Uhlır, R. Kukreja, A. Ulvestad, E. M. Dufresne, A. R. Sandy, E. E. Fullerton, and O. G. Shpyrko, Physical Review B 94, 174110 (2016) (link)
18. Measurement of collective excitations in VO2 by resonant inelastic x-ray scattering Haowei He A. X. Gray, P. Granitzka, J.W. Jeong, N. P. Aetukuri, R. Kukreja, Lin Miao, S. Alexander Breitweiser, Jinpeng Wu, Y. B. Huang, P. Olalde-Velasco, J. Pelliciari, W. F. Schlotter, E. Arenholz, T. Schmitt, M. G. Samant, S. S. P. Parkin, H. A. Durr, and L. Andrew Wray, Physical Review B 94, 161119 (2016) (link)
17. Photoinduced Enhancement of the Charge Density Wave Amplitude A. Singer, S. K. K. Patel, R. Kukreja, V. Uhlíř, J. Wingert, S. Festersen, D. Zhu, J. M. Glownia, H. T. Lemke, S. Nelson, M. Kozina, K. Rossnagel, M. Bauer, B. M. Murphy, O. M. Magnussen, E. E. Fullerton, and O. G. Shpyrko, Physical Review Letters 117, 056401 (2016) (link)
16. Phase separation in the nonequilibrium Verwey transition in magnetite F. Randi, I. Vergara, F. Novelli, M. Esposito, M. Dell’Angela, V. A. M. Brabers, P. Metcalf, R. Kukreja, H. A. Dürr, D. Fausti, M. Grüninger, and F. Parmigiani, Physical Review B 93, 054305 (2016) (link)
15. Correlation-Driven Insulator-Metal Transition in Near-Ideal Vanadium Dioxide Films A. X. Gray, J. Jeong, N. P. Aetukuri, P. Granitzka, Z. Chen, R. Kukreja, D. Higley, T. Chase, A. H. Reid, H. Ohldag, M. A. Marcus, A. Scholl, A. T. Young, A. Doran, C. A. Jenkins, P. Shafer, E. Arenholz, M. G. Samant, S. S. P. Parkin, and H. A. Dürr, Physical Review Letters 116, 116403 (2016) (link)
14. Generation mechanism of terahertz coherent acoustic phonons in Fe T. Henighan, M. Trigo, S. Bonetti, P. Granitzka, D. Higley, Z. Chen, M. P. Jiang, R. Kukreja, A. Gray, A. H. Reid, E. Jal, M. C. Hoffmann, M. Kozina, S. Song, M. Chollet, D. Zhu, P. F. Xu, J. Jeong, K. Carva, P. Maldonado, P. M. Oppeneer, M. G. Samant, S. S. P. Parkin, D. A. Reis, and H. A. Dürr, Phys. Rev. B 93, 220301 (2016) (link)
13. X-Ray Detection of Transient Magnetic Moments Induced by a Spin Current in Cu R. Kukreja, S. Bonetti, Z. Chen, D. Backes, Y. Acremann, J. A. Katine, A.D. Kent, H. A. Dürr, H. Ohldag, and J. Stöhr, Physical Review Letters 115, 096601 (2015) (Editor’s Suggestion, Physics Viewpoint) (link)
12. Direct observation and imaging of a spin-wave soliton with p-like symmetry S. Bonetti, R. Kukreja, Z. Chen, F. Macia, J. M. Hernandez, A. Eklund, D. Backes, J. Frisch, J. Katine, G. Malm, A. Kent, S. Urazhdin, J. Stöhr, H.Ohldag and H. Dürr, Nature Communications 6, 8889 (2015) (link)
11. Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5–10 GHz frequency range Stefano Bonetti, Roopali Kukreja, Zhao Chen, Detlef Spodding, Katharina Ollefs, Christian Schöppner, Ralf Meckenstock, Andreas Ney, Jude Pinto, Richard Houanche, Josef Frisch, Jöachim Stöhr, Herman Dürr and Hendrik Ohldag, Review of Scientific Instruments 86, 093703 (2015) (link)
10. Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact D. Backes, F. Macia, S. Bonetti, R. Kukreja, H. Ohldag and A. D. Kent, Phyical Review Letters 115, 127205 (2015) (link)
9. The role of space charge in photo-emission experiments A. Fognini, G. Salvatella, T. U. Michlmayr, C. Wetli, U. Ramsperger, T. Bähler, F. Sorgenfrei, M. Beye, a Eschenlohr, N. Pontius, C. Stamm, F. Hieke, M. Dell’Angela, S. de Jong, R. Kukreja, N. Gerasimova, V. Rybnikov, H. Redlin, J. Raabe, A Föhlisch, H. A. Dürr, W. Wurth, D. Pescia, a Vaterlaus, and Y. Acremann, New Journal of Physics 16, 043031 (2014) (link)
8. Ultrafast reduction of the total magnetization in iron A. Fognini, T. U. Michlmayr, G. Salvatella, C. Wetli, U. Ramsperger, T. Bähler, F. Sorgenfrei, M. Beye, A. Eschenlohr, N. Pontius, C. Stamm, F. Hieke, M. Dell’Angela, S. de Jong, R. Kukreja, N. Gerasimova, V. Rybnikov, A. Al-Shemmary, H. Redlin, J. Raabe, A. Föhlisch, H. A. Dürr, W. Wurth, D. Pescia, A. Vaterlaus, and Y. Acremann, Applied Physics Letters 104, 032402 (2014) (link)
7. Speed limit of the insulator-metal transition in magnetite S. de Jong*, R. Kukreja*, C. Trabant, N. Pontius, C.F. Chang, T. Kachel, M. Beye, F. Sorgenfrei, C. H. Back, B. Bräuer, W. F. Schlotter, J. J. Turner, O. Krupin, M. Doehler, D. Zhu, M. A. Hossain, A. O. Scherz, W. S. Lee, Y. D. Chuang, D. H. Lu, R. G. Moore, M. Yi, M. Trigo, P. Kirchmann, L. Pathey, M. S. Golden, M. Buchholz, P. Metcalf, W. Wurth, A. Föhlisch, C. Schüßler-Langeheine and H. A. Dürr, Nature Materials 12, 882 (2013) (* equal contribution) (link)
6. Control of the metal-insulator transition in vanadium dioxide by modifying orbital occupany N.B. Aetukuri, A.X. Gray, M. Drouard, M. Cossale, L.Gao, A.H. Reid, R. Kukreja, H. Ohldag, C.A. Jenkins, E. Arenholz, K.P. Roche, H.A Dürr, M.G. Samant and S.S.P. Parkin Nature Physics 9, 661 (2013) (link)
5. Femtosecond single-shot imaging of nanoscale ferromagnetic order in CoPd multilayers using resonant x-ray holography T. Wang, D. Zhu, B. Wu, C. Graves, S. Schaffert, T. Rander, L. Müller, B. Vodungbo, C. Baumier, D. Bernstein, B. Bräuer, V. Cros, S. de Jong, R. Delaunay, A. Fognini, R. Kukreja, S. Lee, V. López-Flores, J. Mohanty, B. Pfau, H. Popescu, M. Sacchi, A. B. Sardinha, F. Sirotti, P. Zeitoun, Messerschmidt, J. J. Turner, W. F. Schlotter, O. Hellwig, R. Mattana, N. Jaouen, F. Fortuna, Y. Acremann, C. Gutt, H. A. Dürr, E. Beaurepaire, C. Boeglin, S. Eisebitt, G. Grübel, J. Lüning, J. Stöhr, and A. O. Scherz, Physical Review Letters 108, 267403 (2012) (link)
4. Nonuniform switching of the perpendicular magnetization in a spin-torque-driven magnetic nanopillar David. P. Bernstein, Björn Bräuer, Roopali Kukreja, Joachim Stöhr, Thomas Hauet, Julien Cucchiara, Stéphane Mangin, Jordan A. Katine, Tolek Tyliszczak, Kang W. Chou and Yves Acremann, Physical Review B 83, 180410(R) (2011) (Editors’ suggestion) (link)
3. Carrier mobility in pentacene as a function of grain size and orientation derived from scanning transmission X-ray microscopy Bjorn Bräuer, Roopali Kukreja, Ajay Virkar, Hylke B. Akkerman, Andreas Fognini, Tolek Tyliszczak, and Zhenan Bao, Organic. Electronics 12, 1936 (2011) (link)
2. Solvent additives and their effects on blend morphologies of bulk heterojunctions Teddy Salim, Lydia Helena Wong, Björn Bräuer, Roopali Kukreja, Yong Lim Foo, Zhenan Bao and Yeng Ming Lam, Journal of Materials Chemistry 21, 242 (2011) (link)
1. X-ray Microscopy Imaging of the Grain Orientation in a Pentacene Field-Effect Transistor Björn Bräuer, Ajay Virkar, Stefan C. B. Mannsfeld, David P. Bernstein, Roopali Kukreja, Kang Wei Chou, Tolek Tyliszczak, Zhenan Bao, and Yves Acremann, Chemistry Materials 22, 3693 (2010) (link)