Magnetic excitations beyond the single- and double-magnons

Autor: Hebatalla Elnaggar, Abhishek Nag, Maurits W. Haverkort, Mirian Garcia-Fernandez, Andrew Walters, Ru-Pan Wang, Ke-Jin Zhou, Frank de Groot

Publikováno v: Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)

Abstract A photon carrying one unit of angular momentum can change the spin angular momentum of a magnetic system with one unit (ΔMs = ±1) at most. This implies that a two-photon scattering process can manipulate the spin angular momentum of the ma

Externí odkaz: https://doaj.org/article/7867fc874f374be48bd1d141ff0a1418

Direct and real-time observation of hole transport dynamics in anatase TiO2 using X-ray free-electron laser

Autor: Sang Han Park, Abhishek Katoch, Keun Hwa Chae, Sanjeev Gautam, Piter Miedema, Sang Wan Cho, Minseok Kim, Ru-Pan Wang, Masoud Lazemi, Frank de Groot, Soonnam Kwon

Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)

Direct and real-time observation of the excess holes in an element-specific and energylevel-specific manner is a challenging task. Here the authors present a complete hole dynamics of photo-excited anatase TiO2 with 100 femto-second resolution.

Externí odkaz: https://doaj.org/article/7c0f369caeaa4b41b0ebb7a4cd83c5f7

Ultrafast X-ray imaging of the light-induced phase transition in VO2

Autor: Allan S. Johnson, Daniel Perez-Salinas, Khalid M. Siddiqui, Sungwon Kim, Sungwook Choi, Klara Volckaert, Paulina E. Majchrzak, Søren Ulstrup, Naman Agarwal, Kent Hallman, Richard F. Haglund, Christian M. Günther, Bastian Pfau, Stefan Eisebitt, Dirk Backes, Francesco Maccherozzi, Ann Fitzpatrick, Sarnjeet S. Dhesi, Pierluigi Gargiani, Manuel Valvidares, Nongnuch Artrith, Frank de Groot, Hyeongi Choi, Dogeun Jang, Abhishek Katoch, Soonnam Kwon, Sang Han Park, Hyunjung Kim, Simon E. Wall

Publikováno v: Johnson, A S, Perez-Salinas, D, Siddiqui, K, Kim, S, Choi, S, Volckaert, K, Majchrzak, P E, Ulstrup, S, Agarwal, N, Hallman, K A, Haglund, R F, Günther, C M, Pfau, B, Eisebitt, S, Backes, D, Maccherozzi, F, Fitzpatrick, A, Dhesi, S S, Gargiani, P, Valvidares, M, Artrith, N, de Groot, F, Choi, H, Jang, D, Katoch, A, Kwon, S, Park, S H, Kim, H & Wall, S E 2023, ' Ultrafast X-ray imaging of the light-induced phase transition in VO2 ', Nature Physics, vol. 19, pp. 215 . https://doi.org/10.1038/s41567-022-01848-w
Johnson, A S, Perez-Salinas, D, Siddiqui, K M, Kim, S, Choi, S, Volckaert, K, Majchrzak, P E, Ulstrup, S, Agarwal, N, Hallman, K, Haglund, R F, Günther, C M, Pfau, B, Eisebitt, S, Backes, D, Maccherozzi, F, Fitzpatrick, A, Dhesi, S S, Gargiani, P, Valvidares, M, Artrith, N, de Groot, F, Choi, H, Jang, D, Katoch, A, Kwon, S, Park, S H, Kim, H & Wall, S E 2023, ' Ultrafast X-ray imaging of the light-induced phase transition in VO 2 ', Nature Physics, vol. 19, no. 2, pp. 215-220 . https://doi.org/10.1038/s41567-022-01848-w

Using light to control transient phases in quantum materials is an emerging route to engineer new properties and functionality, with both thermal and non-thermal phases observed out of equilibrium. Transient phases are expected to be heterogeneous, e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::635ec0caae20f9fe2711c1f2b7206fbc

Deactivation of Cu-Exchanged Automotive-Emission NH

Autor: Xinwei, Ye, Joel E, Schmidt, Ru-Pan, Wang, Ilse K, van Ravenhorst, Ramon, Oord, Tiehong, Chen, Frank, de Groot, Florian, Meirer, Bert M, Weckhuysen

Publikováno v: Angewandte Chemie (International ed. in English). 59(36)

To gain insight into the underlying mechanisms of catalyst durability for the selective catalytic reduction (SCR) of NO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::99543bb865f4bed5a65ab4170cca5e13
https://pubmed.ncbi.nlm.nih.gov/32011783

On the enzymatic activity of catalase: an iron L-edge X-ray absorption study of the active centre

Autor: Nora, Bergmann, Sébastien, Bonhommeau, Kathrin M, Lange, Stefanie M, Greil, Stefan, Eisebitt, Frank, de Groot, Majed, Chergui, Emad F, Aziz

Publikováno v: Physical chemistry chemical physics : PCCP. 12(18)

Catalase and methaemoglobin have very similar haem groups, which are both ferric, yet catalase decomposes hydrogen peroxide to water and oxygen very efficiently, while methaemoglobin does not. Structural studies have attributed this behaviour to thei

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::54a0f3af8e33df955670d25f27f612fb
https://pubmed.ncbi.nlm.nih.gov/29862392