RSS feeds
РусскийEnglish
Issue 5, 2024
Volume year page
Issues Authors PACS Subscription For authors

Issues

 / 

2019

 / 

March

←  →

Conferences and symposia


New effects of the electron—phonon interaction in dielectrics

,
Institute of Spectroscopy, Russian Academy of Sciences, ul. Fizicheskaya 5, Troitsk, Moscow, 108840, Russian Federation

We have studied the electron—phonon interaction (EPI) in multiferroic ${\text PrFe}_3({\text BO}_3){}_4$ using far-infrared (terahertz) reflection and theoretical simulation. A specific feature of ${\text PrFe}_3({\text BO}_3){}_4$ is that the 4f electronic excitation of the ${\text Pr}^{\,3+}$ ion falls into a range between the longitudinal (LO) and transverse (TO) phonon frequencies. Inversion of the electronic oscillator occurs: its LO frequency becomes smaller than the TO frequency. As temperature diminishes, a coupled electron—phonon mode emerges, and a new effect is observed: the reststrahlen band corresponding to a nondegenerate phonon mode splits. Another effect caused by the EPI is the existence of a gap in the spectrum of electronic excitations of a stoichiometric rare-earth easy-axis antiferromagnet placed into an arbitrarily weak external magnetic field directed along the easy magnetization axis.

Fulltext pdf (820 KB)
Fulltext is also available at DOI: 10.3367/UFNe.2018.06.038413
Keywords: inverted electronic oscillator, electron—phonon interaction, coupled electron—phonon mode, bifurcations in magnetic field, terahertz spectroscopy
PACS: 63.20.kd, 71.70.−d, 75.50.Ee, 75.85.+t, 78.20.Bh, 78.30.−j (all)
DOI: 10.3367/UFNe.2018.06.038413
URL: https://ufn.ru/en/articles/2019/3/f/
000469214700006
2-s2.0-85069543197
2019PhyU...62..275P
Citation: Popova M N, Boldyrev K N "New effects of the electron—phonon interaction in dielectrics" Phys. Usp. 62 275–281 (2019)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 12th, August 2018, 20th, June 2018

Оригинал: Попова М Н, Болдырев К Н «Новые эффекты электрон-фононного взаимодействия в диэлектриках (к 50-летию Института спектроскопии РАН)» УФН 189 292–298 (2019); DOI: 10.3367/UFNr.2018.06.038413

References (38) Cited by (5) Similar articles (20) ↓

  1. A.A. Mukhin, A.M. Kuzmenko et al “Dynamic magnetoelectric phenomena within electromagnons in rare-earth borate multiferroics” 58 993–1001 (2015)
  2. M.N. Popova “Infrared spectroscopy of new spin-Peierls compounds” 42 288–290 (1999)
  3. A.M. Kalashnikova, A.V. Kimel, R.V. Pisarev “Ultrafast optomagnetism” 58 969–980 (2015)
  4. A.K. Zvezdin, A.P. Pyatakov “Inhomogeneous magnetoelectric interaction in multiferroics and related new physical effects” 52 845–851 (2009)
  5. S.S. Sosin, L.A. Prozorova, A.I. Smirnov “New magnetic states in crystals” 48 83–90 (2005)
  6. A.P. Pyatakov, A.S. Sergeev et al “Micromagnetism and topologic defects in magnetoelectric media” 58 981–992 (2015)
  7. S.V. Chekalin “Femtosecond spectroscopy of promising materials” 57 622–629 (2014)
  8. “90th anniversary of the birth of A S Borovik-Romanov (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 24 March 2010)” 53 843–858 (2010)
  9. A.I. Smirnov, L.E. Svistov et al “Triangular lattice antiferromagnet RbFe(MoO4)2” 53 844–848 (2010)
  10. V.I. Balykin, A.N. Ryabtsev et al “On the 40th anniversary of the Institute of Spectroscopy of the Russian Academy of Sciences (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 8 October 2008)” 52 275–309 (2009)
  11. E.A. Vinogradov, B.N. Mavrin et al “Inverted optical phonons in ion-covalent crystals” 52 290–293 (2009)
  12. V.V. Dmitriev, S.S. Sosin et al “Joint scientific session of the Physical Sciences Division of the Russian Academy of Sciences and the Joint Physical Society of the Russian Federation (honoring the 110th birthday of P L Kapitza and the 70th anniversary of the P L Kapitza Institute for Physical Problems) (16 June 2004)” 48 77–83 (2005)
  13. A.I. Smirnov, V.N. Glazkov “Defects in spin-gap magnets: multispin clusters” 45 1192–1195 (2002)
  14. T.T. Basiev “Spectroscopy of new SRS-active crystals and solid-state SRS lasers” 42 1051–1056 (1999)
  15. A.I. Smirnov, I.N. Khlyustikov “Magnetoelectric effects and the Stark effect in antiferromagnetic Gd2CuO4” 38 1169–1173 (1995)
  16. I.A. Zaliznyak, O.A. Petrenko, L.A. Prozorova “Properties of quasi-one-dimensional antiferromagnets with noncollinear structure” 35 (4) 328–330 (1992)
  17. G.V. Kozlov, A.A. Mukhin et al “Spin-flipping transitions and dynamic properties of rare-earth weak ferromagnetics” 34 (9) 835–836 (1991)
  18. V.I. Anisimov, V.P. Antropov et al “Band theory of magnetism in metals and alloys” 31 773–775 (1988)
  19. A.A. Mukhin, V.Yu. Ivanov et al “Terahertz spectroscopy and the magnetoelectric properties of manganite-based multiferroics” 52 851–856 (2009)
  20. V.V. Zheleznyakov, V.V. Kocharovskii, V.V. Kocharovskii “Polarization waves and superradiance” 29 1059–1060 (1986)

The list is formed automatically.
© 1918–2024 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions