Zobrazeno 1 - 10 of 71 pro vyhledávání: '"Simon, Wall"'
1
Akademický článek
Multi-mode excitation drives disorder during the ultrafast melting of a C4-symmetry-broken phase
Autor: Daniel Perez-Salinas, Allan S. Johnson, Dharmalingam Prabhakaran, Simon Wall
Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
Light-induced phase transitions are typically described by a time-dependent mean-field theory. Here, the authors show that such a theory fails to capture the order parameter dynamics in a single layered manganite and discuss the role of disorder in u
Externí odkaz: https://doaj.org/article/3f9d8ff3fca1495fb47048c48d847936
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3
Akademický článek
Strain-engineered diffusive atomic switching in two-dimensional crystals
Autor: Janne Kalikka, Xilin Zhou, Eric Dilcher, Simon Wall, Ju Li, Robert E. Simpson
Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
Strain engineering allows design of materials with tailored properties. Here, the authors show that strain can be used to control atomic diffusion in Sb2Te3-GeTe superlattices, and they propose general design rules to enable atomic switching function
Externí odkaz: https://doaj.org/article/70e7cb50a1674a8cba79f84b584759c4
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4
Akademický článek
Does VO_{2} Host a Transient Monoclinic Metallic Phase?
Autor: Luciana Vidas, Daniel Schick, Elías Martínez, Daniel Perez-Salinas, Alberto Ramos-Álvarez, Simon Cichy, Sergi Batlle-Porro, Allan S. Johnson, Kent A. Hallman, Richard F. Haglund, Jr., Simon Wall
Publikováno v: Physical Review X, Vol 10, Iss 3, p 031047 (2020)
Ultrafast phase transitions induced by femtosecond light pulses present a new opportunity for manipulating the properties of materials. Understanding how these transient states are different from, or similar to, their thermal counterparts is key to d
Externí odkaz: https://doaj.org/article/21386192dc0649f89d7d653cae783b15
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5
Programmable chalcogenide-based all-optical deep neural networks
Autor: Ting Yu Teo, Xiaoxuan Ma, Ernest Pastor, Hao Wang, Jonathan K. George, Joel K. W. Yang, Simon Wall, Mario Miscuglio, Robert E. Simpson, Volker J. Sorger
Publikováno v: Teo, T Y, Ma, X, Pastor, E, Wang, H, George, J K, Yang, J K W, Wall, S, Miscuglio, M, Simpson, R E & Sorger, V J 2022, ' Programmable chalcogenide-based all-optical deep neural networks ', Nanophotonics, vol. 11, no. 17, pp. 4073-4088 . https://doi.org/10.1515/nanoph-2022-0099
We demonstrate a passive all-chalcogenide all-optical perceptron scheme. The network’s nonlinear activation function (NLAF) relies on the nonlinear response of Ge2Sb2Te5 to femtosecond laser pulses. We measured the sub-picosecond time-resolved opti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd29ed09e11b215017c6a3301741897b
https://pure.au.dk/portal/da/publications/programmable-chalcogenidebased-alloptical-deep-neural-networks(8eb0e871-4fce-48e7-a7d1-58a2a58e7801).html
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7
Quantitative hyperspectral coherent diffractive imaging spectroscopy of a solid-state phase transition in vanadium dioxide
Autor: Richard F. Haglund, Simon Wall, Christian M. Günther, Kent A. Hallman, Bastian Pfau, Jordi Valls Conesa, Daniel Perez-Salinas, Stefan Eisebitt, Luciana Vidas, Allan S. Johnson
Publikováno v: Johnson, A S, Conesa, J V, Vidas, L, Perez-Salinas, D, Günther, C M, Pfau, B, Hallman, K A, Haglund, R F, Eisebitt, S & Wall, S 2021, ' Quantitative hyperspectral coherent diffractive imaging spectroscopy of a solid-state phase transition in vanadium dioxide ', Science Advances, vol. 7, no. 33, eabf1386 . https://doi.org/10.1126/sciadv.abf1386
Science Advances
Phase coexistence during a solid-to-solid transition in a quantum material is measured using x-ray coherent diffractive imaging.
Solid-state systems can host a variety of thermodynamic phases that can be controlled with magnetic fields, strain,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e5cefde503914d362e312b9d9da11bb
https://doi.org/10.1126/sciadv.abf1386
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10
Laser-induced transient magnons in Sr 3 Ir 2 O 7 throughout the Brillouin zone
Autor: Jiaqi Lin, Mark Dean, D. G. Mazzone, Michael Först, Makina Yabashi, Simon Wall, Junji Yang, Jungho Kim, Desmond F. McMorrow, Diling Zhu, Ruitang Wang, Roberto Alonso-Mori, Tadesse Assefa, Yuya Kubota, Allan S. Johnson, Diego Casa, Vivek Thampy, Hasan Yavaş, X. Liu, Ian K. Robinson, Neil J. Robinson, Tetsuo Katayama, Robert Konik, John Hill, Youguo Shi, Roman Mankowsky, Shigeki Owada, Yue Cao, Jian Liu, C. D. Dashwood, Hu Miao, Yoshikazu Tanaka, Derek Meyers, A. J. A. James, Sanghoon Song, J. G. Vale
Publikováno v: Proceedings of the National Academy of Sciences of the United States of America
Mazzone, D G, Meyers, D, Cao, Y, Vale, J G, Dashwood, C D, Shi, Y, James, A J A, Robinson, N J, Lin, J, Thampy, V, Tanaka, Y, Johnson, A S, Miao, H, Wang, R, Assefa, T A, Kim, J, Casa, D, Mankowsky, R, Zhu, D, Alonso-Mori, R, Song, S, Yavas, H, Katayama, T, Yabashi, M, Kubota, Y, Owada, S, Liu, J, Yang, J, Konik, R M, Robinson, I K, Hill, J P, McMorrow, D F, Först, M, Wall, S, Liu, X & Dean, M P M 2021, ' Laser-induced transient magnons in Sr 3 Ir 2 O 7 throughout the Brillouin zone ', Proceedings of the National Academy of Sciences of the United States of America, vol. 118, no. 22, e2103696118 . https://doi.org/10.1073/pnas.2103696118
Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::941ffb5e27e0735064d437e8fe2cb4cb
https://doi.org/10.1073/pnas.2103696118
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