Phonon density of states of iron up to 153 gigapascals

Science
H K MaoG Wortmann

Abstract

We report phonon densities of states (DOS) of iron measured by nuclear resonant inelastic x-ray scattering to 153 gigapascals and calculated from ab initio theory. Qualitatively, they are in agreement, but the theory predicts density at higher energies. From the DOS, we derive elastic and thermodynamic parameters of iron, including shear modulus, compressional and shear velocities, heat capacity, entropy, kinetic energy, zero-point energy, and Debye temperature. In comparison to the compressional and shear velocities from the preliminary reference Earth model (PREM) seismic model, our results suggest that Earth's inner core has a mean atomic number equal to or higher than pure iron, which is consistent with an iron-nickel alloy.

References

Dec 13, 1996·Science·G A Glatzmaier, P H Roberts
Oct 30, 1998·Science·X Song, D V Helmberger
Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Apr 1, 1996·Physical Review. B, Condensed Matter·E WassermanR E Cohen
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jun 21, 1993·Physical Review Letters·C S YooC Pike
May 8, 1995·Physical Review Letters·W SturhahnB Dabrowski
Feb 26, 2000·Science·R LubbersG Wortmann

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Citations

Sep 12, 2013·Inorganic Chemistry·Qian PengW Robert Scheidt
Mar 23, 2010·Proceedings of the National Academy of Sciences of the United States of America·Lin WangHo-kwang Mao
Dec 7, 2011·Proceedings of the National Academy of Sciences of the United States of America·Ho-Kwang MaoRajeev Ahuja
Jun 13, 2012·Proceedings of the National Academy of Sciences of the United States of America·Zhu MaoHo-Kwang Mao
Mar 5, 2008·The Review of Scientific Instruments·Elizabeth A TanisMalcolm F Nicol
Feb 2, 2011·The Review of Scientific Instruments·Chunyuan HeChunxiao Gao
Apr 21, 2007·Proceedings of the National Academy of Sciences of the United States of America·Bin ChenJie Li
Aug 16, 2001·Proceedings of the National Academy of Sciences of the United States of America·L S DubrovinskyT Le Bihan
Aug 3, 2014·The Journal of Chemical Physics·Divya SrivastavaSubir K Sarkar
Dec 3, 2014·Proceedings of the National Academy of Sciences of the United States of America·Bin ChenJie Li
Mar 5, 2016·Scientific Reports·Youjun ZhangMingjian Zhang
Jan 21, 2014·Scientific Reports·Morten M SmedskjaerYuanzheng Yue
May 2, 2015·Journal of Synchrotron Radiation·Wenli BiE Ercan Alp
Nov 13, 2003·Physical Review Letters·Makoto SetoTatsuo Ishikawa
Dec 12, 2001·Physical Review Letters·V V StruzhkinG Shen
Nov 25, 2011·Nature·Haijun HuangZizheng Gong
Jun 28, 2006·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Wendy L Mao, Ho-Kwang Mao
Jun 28, 2006·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Yanzhang MaJavad Hashemi
Mar 21, 2008·Physical Review Letters·Daniele AntonangeliGuillaume Fiquet
Dec 5, 2012·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hisao KobayashiMasahiko Machida
Feb 23, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jiansheng Wu, Philip Phillips
Jan 4, 2017·The Review of Scientific Instruments·Pavel V ZininShiv K Sharma
Jul 3, 2017·The Review of Scientific Instruments·T MasudaK Yoshimura
Nov 23, 2016·Reports on Progress in Physics·Guoyin Shen, Ho Kwang Mao
Jan 15, 2011·Physical Review Letters·Ho Kwang MaoWendy L Mao
Sep 28, 2010·Physical Review Letters·C M FangH W Zandbergen
Dec 17, 2004·Physical Review Letters·Hisao KobayashiEsen E Alp
Nov 13, 2007·Physical Review Letters·S StankovJ Korecki
Mar 2, 2010·The Journal of Physical Chemistry. B·Tuomas PylkkänenSimo Huotari
Apr 14, 2018·The Journal of Physical Chemistry Letters·Cheng Lu, Changfeng Chen
Jan 25, 2003·Science·Caroline Beghein, Jeannot Trampert
Jun 25, 2005·Science·Jung-Fu LinRussell J Hemley
Jan 12, 2002·Science·Jung-Fu LinGuoyin Shen

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