%0 Journal Article
%A Siska, Emily
%A Smith, G. Alexander
%A Villa-Cortes, Sergio
%A Conway, Lewis J.
%A Husband, Rachel
%A Van Cleave, Joshua
%A Petitgirard, Sylvain
%A Cerantola, Valerio
%A Appel, Karen
%A Baehtz, Carsten
%A Bouffetier, Victorien
%A Dwivedi, Anand
%A Göde, Sebastian
%A Gorkhover, Tais
%A Konopkova, Zuzana
%A Hosseini Saber, Seyedmohammadali
%A Kuschel, Stephan
%A Laurus, Torsten
%A Nakatsutsumi, Motoaki
%A Strohm, Cornelius
%A Sztuk-Dambietz, Jolanta
%A Zastrau, Ulf
%A Smith, Dean
%A Lawler, Keith V.
%A Pickard, Chris J.
%A Schwartz, Craig P.
%A Salamat, Ashkan
%T Ultrafast Yttrium Hydride Chemistry at High Pressures via Non-equilibrium States Induced by an X-ray Free Electron Laser
%J The journal of physical chemistry letters
%V 15
%N 39
%@ 1948-7185
%C Washington, DC
%I ACS
%M PUBDB-2024-06953
%P 9912-9919
%D 2024
%X Controlling the formation and stoichiometric content of the desired phases of materials has become of central interest for a variety of fields. The possibility of accessing metastable states by initiating reactions by X-ray-triggered mechanisms over ultrashort time scales has been enabled by the development of X-ray free electron lasers (XFELs). Utilizing the exceptionally high-brilliance X-ray pulses from the EuXFEL, we report the synthesis of a previously unobserved yttrium hydride under high pressure, along with nonstoichiometric changes in hydrogen content as probed at a repetition rate of 4.5 MHz using time-resolved X-ray diffraction. Exploiting non-equilibrium pathways, we synthesize and characterize a hydride in a Weaire–Phelan structure type at pressures as low as 125 GPa, predicted using a crystal structure search, with a hydrogen content of 4.0–5.75 hydrogens per cation, that is enthalpically metastable on the convex hull.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:39303208
%U <Go to ISI:>//WOS:001318699400001
%R 10.1021/acs.jpclett.4c02134
%U https://bib-pubdb1.desy.de/record/617647