Download

Full Text

• H. Katzke and P. Tolédano, Phys. Rev. B 77, 024109 (2008). PRBMDO 1098-0121 10.1103/PhysRevB.77.024109
• H. Iwasaki and T. Kikegawa, Physica B+C 139, 259 (1986). PHBCDQ 0378-4363 10.1016/0378-4363(86)90572-3
• K. J. Chang and M. L. Cohen, Phys. Rev. B 33, 7371 (1986). PRBMDO 0163-1829 10.1103/PhysRevB.33.7371
• A. B. Shick, J. B. Ketterson, D. L. Novikov, and A. J. Freeman, Phys. Rev. B 60, 15484 (1999). PRBMDO 0163-1829 10.1103/PhysRevB.60.15484
• M. I. McMahon, O. Degtyareva, and R. J. Nelmes, Phys. Rev. Lett. 85, 4896 (2000). PRLTAO 0031-9007 10.1103/PhysRevLett.85.4896
• U. Schwarz, L. Akselrud, H. Rosner, A. Ormeci, Y. Grin, and M. Hanfland, Phys. Rev. B 67, 214101 (2003). PRBMDO 0163-1829 10.1103/PhysRevB.67.214101
• K. Aoki, S. Fujiwara, and M. Kusakabe, Solid State Commun. 45, 161 (1983). SSCOA4 0038-1098 10.1016/0038-1098(83)90367-8
• O. Degtyareva, M. I. McMahon, and R. J. Nelmes, Phys. Rev. B 70, 184119 (2004). PRBMDO 1098-0121 10.1103/PhysRevB.70.184119
• X. Wang, K. Kunc, I. Loa, U. Schwarz, and K. Syassen, Phys. Rev. B 74, 134305 (2006). PRBMDO 1098-0121 10.1103/PhysRevB.74.134305
• H. Olijnyk, S. Nakano, and K. Takemura, Phys. Status Solidi B 244, 3572 (2007). PSSBBD 0370-1972 10.1002/pssb.200642467
• O. Degtyareva, V. V. Struzhkin, and R. J. Hemley, Solid State Commun. 141, 164 (2007). SSCOA4 0038-1098 10.1016/j.ssc.2006.10.009
• H. J. Beister, K. Strössner, and K. Syassen, Phys. Rev. B 41, 5535 (1990). PRBMDO 0163-1829 10.1103/PhysRevB.41.5535
• J. Serrano and A. H. Romero, High Press. Res. 28, 477 (2008). HPRSEL 0895-7959 10.1080/08957950802500183
• R. I. Sharp and E. Warming, J. Phys. F: Met. Phys. 1, 570 (1971). JPFMAT 0305-4608 10.1088/0305-4608/1/5/311
• J. Sosnowski, E. F. Maliszewski, S. Bednarski, and A. Czachor, Phys. Status Solidi B 44, K65 (1971). PSSBBD 0370-1972 10.1002/pssb.2220440250
• http://www.surfacenet.de.
• K. Syassen, High Press. Res. 28, 75 (2008). HPRSEL 0895-7959 10.1080/08957950802235640
• https://www.dectris.com/.
• Agilent. CrysAlis PRO.Agilent Technologies Ltd (Yarnton, Oxfordshire, England, 2014).
• M. Krisch and F. Sette, Light Scattering in Solid IX (Springer, Berlin, Heidelberg, 2007), pp. 317-370.
• G. Grosso and G. P. Parravicini, in Solid State Physics 2nd ed., edited by G. Grosso and G. P. Parravicini (Academic Press, Amsterdam, 2014), pp. 437-482.
• A. Q. R. Baron, High-resolution inelastic x-ray scattering II: Scattering theory, harmonic phonons, and calculations, Synchrotron Light Sources and Free-Electron Lasers (Springer, Berlin, Germany, 2015).
• X. Gonze, J.-M. Beuken, R. Caracas, F. Detraux, M. Fuchs, G.-M. Rignanese, L. Sindic, M. Verstraete, G. Zerah, F. Jollet, Comput. Mater. Sci. 25, 478 (2002). CMMSEM 0927-0256 10.1016/S0927-0256(02)00325-7
• X. Gonze, F. Jollet, F. A. Araujo, D. Adams, B. Amadon, T. Applencourt, C. Audouze, J.-M. Beuken, J. Bieder, A. Bokhanchuk, Comput. Phys. Commun. 205, 106 (2016). CPHCBZ 0010-4655 10.1016/j.cpc.2016.04.003
• X. Gonze, B. Amadon, P.-M. Anglade, J.-M. Beuken, F. Bottin, P. Boulanger, F. Bruneval, D. Caliste, R. Caracas, M. Côté, Comput. Phys. Commun. 180, 2582 (2009). CPHCBZ 0010-4655 10.1016/j.cpc.2009.07.007
• X. Gonze, Z. Kristallogr. Cryst. Mater. 220, 558 (2009). 10.1524/zkri.220.5.558.65066
• M. Fuchs and M. Scheffler, Comput. Phys. Commun. 119, 67 (1999). CPHCBZ 0010-4655 10.1016/S0010-4655(98)00201-X
• W. Kohn and L. J. Sham, Phys. Rev. 140, A1133 (1965). PHRVAO 0031-899X 10.1103/PhysRev.140.A1133
• P.-M. Anglade and X. Gonze, Phys. Rev. B 78, 045126 (2008). PRBMDO 1098-0121 10.1103/PhysRevB.78.045126
• X. Gonze, Phys. Rev. B 55, 10337 (1997). PRBMDO 0163-1829 10.1103/PhysRevB.55.10337
• D. R. Hamann, Phys. Rev. B 88, 085117 (2013). PRBMDO 1098-0121 10.1103/PhysRevB.88.085117
• M. J. van Setten, M. Giantomassi, E. Bousquet, M. J. Verstraete, D. R. Hamann, X. Gonze, and G.-M. Rignanese, Comput. Phys. Commun. 226, 39 (2018). CPHCBZ 0010-4655 10.1016/j.cpc.2018.01.012
• X. Gonze and C. Lee, Phys. Rev. B 55, 10355 (1997). PRBMDO 0163-1829 10.1103/PhysRevB.55.10355
• S. Baroni, S. de Gironcoli, A. Dal Corso, and P. Giannozzi, Rev. Mod. Phys. 73, 515 (2001). RMPHAT 0034-6861 10.1103/RevModPhys.73.515
• See Supplemental Material at http://link.aps.org/supplemental/10.1103/PhysRevB.100.104305 for the DFT calculations showing the eigenvectors of the three acoustic phonons before and after the anticrossing.
• O. Degtyareva, M. I. M. Mahon, and R. J. Nelmes, High Press. Res. 24, 319 (2004). HPRSEL 0895-7959 10.1080/08957950412331281057
• O. Degtyareva, High Press. Res. 30, 343 (2010). HPRSEL 0895-7959 10.1080/08957959.2010.508877
• P. Tolédano and V. Dmitriev, Reconstructive Phase Transitions: In Crystals and Quasicrystals (Word Scientific Publishing, Singapore, 1996).
• U. Haussermann, K. Saderberg, and R. Norrestam, J. Am. Chem. Soc. 124, 15359 (2002). JACSAT 0002-7863 10.1021/ja020832s
• A. L. Korzhenevskii and V. Dmitriev, J. Phys.: Condens. Matter 27, 375401, (2015). JCOMEL 0953-8984 10.1088/0953-8984/27/37/375401
• K. Aoki, S. Fujiwara, and M. Kusakabe, J. Phys. Soc. Jpn. 51, 3826 (1982). JUPSAU 0031-9015 10.1143/JPSJ.51.3826