Evidence of superdense aluminium synthesized by ultrafast microexplosion

Arturas Vailionis, Eugene G. Gamaly, Vygantas Mizeikis, Wenge Yang, Andrei V. Rode and Saulius Juodkazis ()
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Arturas Vailionis: Geballe Laboratory for Advanced Materials, Stanford University
Eugene G. Gamaly: Laser Physics Centre, Research School of Physics and Engineering, The Australian National University
Vygantas Mizeikis: (Research Institute of Electronics), Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan.
Wenge Yang: HPSynC—Carnegie Institution of Washington, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IIlinois 60439, USA.
Andrei V. Rode: Laser Physics Centre, Research School of Physics and Engineering, The Australian National University
Saulius Juodkazis: Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology

Nature Communications, 2011, vol. 2, issue 1, 1-6

Abstract: Abstract At extreme pressures and temperatures, such as those inside planets and stars, common materials form new dense phases with compacted atomic arrangements and unusual physical properties. The synthesis and study of new phases of matter at pressures above 100 GPa and temperatures above 104 K—warm dense matter—may reveal the functional details of planet and star interiors, and may lead to materials with extraordinary properties. Many phases have been predicted theoretically that may be realized once appropriate formation conditions are found. Here we report the synthesis of a superdense stable phase of body-centred-cubic aluminium, predicted by first-principles theories to exist at pressures above 380 GPa. The superdense Al phase was synthesized in the non-equilibrium conditions of an ultrafast laser-induced microexplosion confined inside sapphire (α-Al2O3). Confined microexplosions offer a strategy to create and recover high-density polymorphs, and a simple method for tabletop study of warm dense matter.

Date: 2011
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DOI: 10.1038/ncomms1449

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