33. Capturing ultrafast magnetization phenomenon using femtosecond x-rays Spencer Jeppson and Roopali Kukreja, APL Materials 9, 100702 (2021) (link)

32. 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)

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)

22Ultrafast 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)

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