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Impact of lattice vibrations on equation of state of the hardest boron phase
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics . Linköping University, The Institute of Technology.
Moscow State Institute Steel and Alloys.
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2011 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 83, no 13, 132106- p.Article in journal (Refereed) Published
Abstract [en]

An accurate equation of state (EOS) is determined for the high-pressure orthorhombic phase of boron, B(28), experimentally as well as from ab initio calculations. The unique feature of our experiment is that it is carried out on the single crystal of B(28). In theory, we take into consideration the lattice vibrations, often neglected in first-principles simulations. We show that the phonon contribution has a profound effect on the EOS of B(28), giving rise to anomalously low values of the pressure derivative of the bulk modulus and greatly improving the agreement between theory and experiment.

Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 83, no 13, 132106- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-69916DOI: 10.1103/PhysRevB.83.132106ISI: 000292142300003OAI: oai:DiVA.org:liu-69916DiVA: diva2:433201
Note
Original Publication: Eyvas Isaev, Sergey Simak, Arkady Mikhaylushkin, Yu. Kh. Vekilov, E. Yu. Zarechnaya, L. Dubrovinsky, N. Dubrovinskaia, M. Merlini, M. Hanfland and Igor Abrikosov, Impact of lattice vibrations on equation of state of the hardest boron phase, 2011, Physical Review B. Condensed Matter and Materials Physics, (83), 13, 132106. http://dx.doi.org/10.1103/PhysRevB.83.132106 Copyright: American Physical Society http://www.aps.org/ Available from: 2011-08-09 Created: 2011-08-08 Last updated: 2017-12-08

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Isaev, EyvasSimak, SergeyMikhaylushkin, ArkadyAbrikosov, Igor

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