Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Ross T, Howie"'
Autor:
Tomas Marqueño, Mikhail A. Kuzovnikov, Israel Osmond, Phillip Dalladay-Simpson, Andreas Hermann, Ross T. Howie, Miriam Peña-Alvarez
Publikováno v:
Frontiers in Chemistry, Vol 11 (2024)
The reactivity between NaH and H2 has been investigated through a series of high-temperature experiments up to pressures of 78 GPa in diamond anvil cells combined with first principles calculations. Powder X-ray diffraction measurements show that hea
Externí odkaz:
https://doaj.org/article/831fa4f2d0d3444eb7e028544991fe77
Autor:
Zhongxun Cui, Kejun Bu, Yukai Zhuang, Mary-Ellen Donnelly, Dongzhou Zhang, Philip Dalladay-Simpson, Ross T. Howie, Jiandong Zhang, Xujie Lü, Qingyang Hu
Publikováno v:
Communications Chemistry, Vol 4, Iss 1, Pp 1-8 (2021)
Antimonite (Sb2S3) has potential applications for solar energy, but how its layered structure changes under pressure is incompletely understood. Here diamond anvil cell experiments supported by first principles calculations offer a structural explana
Externí odkaz:
https://doaj.org/article/9dc93019a2774cc8a2d6d21c0dcde095
Autor:
Jack Binns, Miriam Peña-Alvarez, Mary-Ellen Donnelly, Eugene Gregoryanz, Ross T. Howie, Philip Dalladay-Simpson
Publikováno v:
Engineering, Vol 5, Iss 3, Pp 505-509 (2019)
Hydrogen chemistry at extreme pressures is currently subject to extensive research due to the observed and predicted enhanced physical properties when hydrogen is incorporated in numerous binary systems. Despite the high reactivity of hydrogen, the n
Externí odkaz:
https://doaj.org/article/85921eb3824d427a8c7711565cf0eb03
Autor:
Philip Dalladay-Simpson, Jack Binns, Miriam Peña-Alvarez, Mary-Ellen Donnelly, Eran Greenberg, Vitali Prakapenka, Xiao-Jia Chen, Eugene Gregoryanz, Ross T. Howie
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)
Molecular systems are predicted to transform into atomic solids and be metallic at high pressure; this was observed for the diatomic elements iodine and bromine. Here the authors access the higher pressures needed to observe the dissociation in chlor
Externí odkaz:
https://doaj.org/article/6e8240d312e94a9d91cf96adb7c19c88
Autor:
Robin Turnbull, Michael Hanfland, Jack Binns, Miguel Martinez-Canales, Mungo Frost, Miriam Marqués, Ross T. Howie, Eugene Gregoryanz
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)
Nitrogen has a complex phase diagram with rich polymorphism, which is challenging to characterize due to the extreme conditions and uncertain stability ranges needed to do so. Here the authors resolve one of the most elusive phases of this model syst
Externí odkaz:
https://doaj.org/article/158d766c6bd948d2b66b30e7895f7289
Publikováno v:
Matter and Radiation at Extremes, Vol 5, Iss 3, Pp 038101-038101-6 (2020)
The hydrogen molecule is made from the first and lightest element in the periodic table. When hydrogen gas is either compressed or cooled, it forms the simplest molecular solid. This solid exhibits many interesting and fundamental physical phenomena.
Externí odkaz:
https://doaj.org/article/5c337022a3b440e18c34ad419e3afdfb
Author Correction: Band gap closure, incommensurability and molecular dissociation of dense chlorine
Autor:
Philip Dalladay-Simpson, Jack Binns, Miriam Peña-Alvarez, Mary-Ellen Donnelly, Eran Greenberg, Vitali Prakapenka, Xiao-Jia Chen, Eugene Gregoryanz, Ross T. Howie
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-2 (2019)
The original version of this Article omitted references to previous experimental reports on solid hydrogen that are relevant for a full understanding of the context of the previous work. The added references are: 47. Akahama, Y. et al. Evidence from
Externí odkaz:
https://doaj.org/article/3fa41ef5e89843b998ccf29ea76c97eb
Autor:
Graeme J. Ackland, Eugene Gregoryanz, Chris J. Pickard, Bartomeu Monserrat, Philip Dalladay-Simpson, Jack Binns, Miguel Martinez-Canales, Ross T. Howie, Miriam Peña-Alvarez
Publikováno v:
Pena Alvarez, M, Binns, J, Martinez-Canales, M, Monserrat, B, Ackland, G J, Dalladay-Simpson, P, Howie, R T, Pickard, C J & Gregoryanz, E 2021, ' Synthesis of Weaire–Phelan Barium Polyhydride ', The Journal of Physical Chemistry Letters, vol. 12, no. 20, pp. 4910-4916 . https://doi.org/10.1021/acs.jpclett.1c00826
By combining pressures up to 50 GPa and temperatures of 1200 K, we synthesize the novel barium hydride, Ba8H46, stable down to 27 GPa. We use Raman spectroscopy, X-ray diffraction, and first-principles calculations to determine that this compound ado
Autor:
Graeme J. Ackland, Ross T. Howie, Peter Cooke, Philip Dalladay-Simpson, Miriam Peña-Alvarez, Ioan B. Magdău, Xiao-Di Liu, Veronika Afonina, Eugene Gregoryanz
Publikováno v:
Pena Alvarez, M, Afonina, V, Dalladay-Simpson, P, Liu, X-D, Howie, R T, Cooke, P, Magdau, I B, Ackland, G J & Gregoryanz, E 2020, ' Quantitative rotational to librational transition in dense H2 and D2 ', The Journal of Physical Chemistry Letters, vol. 11, no. 16, pp. 6626-6631 . https://doi.org/10.1021/acs.jpclett.0c01736
Raman spectroscopy demonstrates that the rotational spectrum of solid hydrogen, and its isotope deuterium, undergo profound transformations upon compression while still remaining in phase I. We show that these changes are associated with a loss of qu
Autor:
Hui Chao Zhang, Ross T. Howie, Jack Binns, Graeme J. Ackland, Ho-kwang Mao, Eugene Gregoryanz, Xiao-Di Liu, Wan Xu, Philip Dalladay-Simpson
Publikováno v:
Liu, X-D, Dalladay-Simpson, P, Howie, R T, Zhang, H C, Xu, W, Binns, J, Ackland, G J, Mao, H-K & Gregoryanz, E 2020, ' Counterintuitive effects of isotopic doping on the phase diagram of H2-HD-D2 molecular alloy ', Proceedings of the National Academy of Sciences, pp. 13374-13378 . https://doi.org/10.1073/pnas.2001128117
Significance When hydrogen and deuterium are mixed, they form H 2 +HD + D 2 mixtures at very low pressures and room temperature. We show that at high pressures and low temperatures these mixtures behave as an isotopic molecular alloy (ideal solution)