Zobrazeno 1 - 10
of 12
pro vyhledávání: '"J. M. Glownia"'
Autor:
O. Yu. Gorobtsov, L. Ponet, S. K. K. Patel, N. Hua, A. G. Shabalin, S. Hrkac, J. Wingert, D. Cela, J. M. Glownia, D. Zhu, R. Medapalli, M. Chollet, E. E. Fullerton, S. Artyukhin, O. G. Shpyrko, A. Singer
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Precise control of vibrational states coupled to electronic degrees of freedom could enable control over charge or magnetic order in a material. Here, the authors use a double-pulse photoexcitation combined with an X-ray probe to control vibrational
Externí odkaz:
https://doaj.org/article/f4bf9677ba1f45d385170630846bbaae
Autor:
M. P. Jiang, S. Fahy, A. Hauber, É. D. Murray, I. Savić, C. Bray, J. N. Clark, T. Henighan, M. Kozina, A. M. Lindenberg, P. Zalden, M. Chollet, J. M. Glownia, M. C. Hoffmann, T. Sato, D. Zhu, O. Delaire, A. F. May, B. C. Sales, R. Merlin, M. Trigo, D. A. Reis
Publikováno v:
Structural Dynamics, Vol 9, Iss 2, Pp 024301-024301-10 (2022)
We report the observation of photo-induced plasmon–phonon coupled modes in the group IV–VI semiconductor PbTe using ultrafast x-ray diffuse scattering at the Linac Coherent Light Source. We measure the near-zone-center excited-state dispersion of
Externí odkaz:
https://doaj.org/article/52b178575c2941b8bad05b03d6f8db37
Autor:
M. P. Jiang, M. Trigo, I. Savić, S. Fahy, É. D. Murray, C. Bray, J. Clark, T. Henighan, M. Kozina, M. Chollet, J. M. Glownia, M. C. Hoffmann, D. Zhu, O. Delaire, A. F. May, B. C. Sales, A. M. Lindenberg, P. Zalden, T. Sato, R. Merlin, D. A. Reis
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016)
Group IV–VI materials often exist in a state near an electronic or structural phase transition. Here, the authors use ultrafast X-ray scattering to show that coupling of band-edge electrons and phonons causes the ferroelectric instability observed
Externí odkaz:
https://doaj.org/article/83f4952e5a204f1b813f568524223b8f
Autor:
M. Kozina, M. Trigo, M. Chollet, J. N. Clark, J. M. Glownia, A. C. Gossard, T. Henighan, M. P. Jiang, H. Lu, A. Majumdar, D. Zhu, D. A. Reis
Publikováno v:
Structural Dynamics, Vol 4, Iss 5, Pp 054305-054305-8 (2017)
Here, we report Fourier-transform inelastic x-ray scattering measurements of photoexcited GaAs with embedded ErAs nanoparticles. We observe temporal oscillations in the x-ray scattering intensity, which we attribute to inelastic scattering from coh
Externí odkaz:
https://doaj.org/article/fd028afb85bc476db2348311a37fa3b1
Autor:
M. Kozina, T. van Driel, M. Chollet, T. Sato, J. M. Glownia, S. Wandel, M. Radovic, U. Staub, M. C. Hoffmann
Publikováno v:
Structural Dynamics, Vol 4, Iss 5, Pp 054301-054301-7 (2017)
We use ultrafast X-ray pulses to characterize the lattice response of SrTiO3 when driven by strong terahertz fields. We observe transient changes in the diffraction intensity with a delayed onset with respect to the driving field. Fourier analysis
Externí odkaz:
https://doaj.org/article/75b8ba40430c496f82a10d9fef96d839
Autor:
M. Porer, M. Fechner, M. Kubli, M. J. Neugebauer, S. Parchenko, V. Esposito, A. Narayan, N. A. Spaldin, R. Huber, M. Radovic, E. M. Bothschafter, J. M. Glownia, T. Sato, S. Song, S. L. Johnson, U. Staub
Publikováno v:
Physical Review Research, Vol 1, Iss 1, p 012005 (2019)
We present femtosecond hard x-ray diffraction experiments that study the effect of photodoping on the perovskite EuTiO_{3}. We observe an ultrafast transient increase of reflection intensities that are directly related to the antiferrodistortive rota
Externí odkaz:
https://doaj.org/article/189dd99042ba413e8bf5cd7116ba3bd2
Autor:
A. Marino, M. Cammarata, S. F. Matar, J.-F. Létard, G. Chastanet, M. Chollet, J. M. Glownia, H. T. Lemke, E. Collet
Publikováno v:
Structural Dynamics, Vol 3, Iss 2, Pp 023605-023605-15 (2016)
We combine ultrafast optical spectroscopy with femtosecond X-ray absorption to study the photo-switching dynamics of the [Fe(PM-AzA)2(NCS)2] spin-crossover molecular solid. The light-induced excited spin-state trapping process switches the molecules
Externí odkaz:
https://doaj.org/article/bc0279b8c0474f539ec0c33901e2df72
Autor:
S. Zerdane, M. Hervé, S. Mazerat, L. Catala, R. Alonso-Mori, J. M. Glownia, S. Song, M. Levantino, T. Mallah, M. Cammarata, E. Collet
Publikováno v:
Faraday Discussions
Faraday Discussions, 2022, ⟨10.1039/d2fd00015f⟩
Faraday Discussions, 2022, ⟨10.1039/d2fd00015f⟩
International audience; In this paper we study the out-of-equilibrium dynamics associated with photoinduced charge-transfer (CT) in cyanide-bridged Co-Fe Prussian blue analogue nanocrystals. In these coordination networks, the structural trapping of
Autor:
M. P. Jiang, S. Fahy, A. Hauber, É. D. Murray, I. Savić, C. Bray, J. N. Clark, T. Henighan, M. Kozina, A. M. Lindenberg, P. Zalden, M. Chollet, J. M. Glownia, M. C. Hoffmann, T. Sato, D. Zhu, O. Delaire, A. F. May, B. C. Sales, R. Merlin, M. Trigo, D. A. Reis
Publikováno v:
Structural dynamics (Melville, N.Y.). 9(2)
We report the observation of photo-induced plasmon–phonon coupled modes in the group IV–VI semiconductor PbTe using ultrafast x-ray diffuse scattering at the Linac Coherent Light Source. We measure the near-zone-center excited-state dispersion of
Publikováno v:
Opto-Electronics Review. 22
The Linac coherent light source (LCLS) at the SLAC National Accelerator Laboratory (SLAC) is the world’s first hard X-ray free electron laser (XFEL) and is capable of producing high-energy, femtosecond duration X-ray pulses. A common technique to s