Technical Physics Letters

, Volume 44, Issue 9, pp 757–760 | Cite as

Effects of Pressure-Induced Phase Transition in Model Hg2Br2 Ferroelastics

  • E. M. RoginskiiEmail author
  • A. S. Krylov
  • Yu. F. Markov


Raman spectra of model improper ferroelastics (Hg2Br2 crystals) have been analyzed in a wide range of hydrostatic pressures. The baric dependences of the phonon frequencies are obtained. The revealing and anomalous behavior of the soft mode, which is genetically related to the acoustic phonon (ТА1) at the Brillouin zone boundary (point X) of the tetragonal phase, are most interesting. The buildup of the second acoustic phonon (ТА2) from the same point has also been found in the ferroelastic-phase spectra, and its baric behavior has been investigated. The splitting of doubly degenerate phonons of the Eg symmetry has been revealed at fairly high pressures and explained.


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  1. 1.
    H. Mark and J. Steinbach, Z. Kristallogr. 64, 79 (1926).Google Scholar
  2. 2.
    Proceedings of the 2nd International Symposium on Univalent Mercury Halides, Trutnov, ČSFR, 1989.Google Scholar
  3. 3.
    Ch. Barta, A. A. Kaplyanskii, V. V. Kulakov, B. Z. Malkin, and Yu. F. Markov, Sov. Phys. JETP 43, 744 (1976).ADSGoogle Scholar
  4. 4.
    A. A. Kaplyanskii, Yu. F. Markov, and Ch. Barta, Izv. Akad. Nauk SSSR, Fiz. 43, 1641 (1979).Google Scholar
  5. 5.
    B. C. Zadokhin, Yu. F. Markov, and A. S. Yurkov, J. Exp. Theor. Phys. 77, 286 (1993).ADSGoogle Scholar
  6. 6.
    Ch. Barta, A. A. Kaplyanskii, Yu. F. Markov, and V. Yu. Mirovitskii, Sov. Phys. Solid State 27, 1497 (1985).Google Scholar
  7. 7.
    Yu. F. Markov and A. Sh. Turaev, JETP Lett. 63, 241 (1996).ADSCrossRefGoogle Scholar
  8. 8.
    Yu. F. Markov, V. Yu. Mirovitskii, and E. M. Roginskii, Tech. Phys. Lett. 40, 992 (2014).ADSCrossRefGoogle Scholar
  9. 9.
    Yu. F. Markov, V. Yu. Mirovitskii, and E. M. Roginskii, Phys. Solid State 57, 480 (2015).ADSCrossRefGoogle Scholar
  10. 10.
    E. M. Roginskii, A. S. Krylov, Yu. F. Markov, and M. B. Smirnov, Bull. Russ. Acad. Sci.: Phys. 80, 1033 (2016).CrossRefGoogle Scholar
  11. 11.
    F. Datchi, A. Dewaele, P. Loubeyre, R. Letoullec, Y. le Godec, and B. Canny, High Press. Res. 27, 447 (2007).ADSCrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • E. M. Roginskii
    • 1
    Email author
  • A. S. Krylov
    • 2
  • Yu. F. Markov
    • 1
  1. 1.Ioffe Physical Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Kirensky Institute of Physics, Siberian BranchRussian Academy of SciencesKrasnoyarskRussia

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