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This article is cited in 6 scientific papers (total in 6 papers)
CONFERENCES AND SYMPOSIA
New effects of the electron–phonon interaction in dielectrics (50th anniversary of the Institute of Spectroscopy, Russian Academy of Sciences)
M. N. Popova, K. N. Boldyrev Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow
Abstract:
We have studied the electron–phonon interaction (EPI) in multiferroic $\rm{PrFe_3(BO_3)_4}$ applying reflection methods in far-infrared (terahertz) spectral range and theoretical simulations. A specific feature of $\rm{PrF_3(BO_3)_4}$ is that the 4f-electron excitation of the $\rm{Pr^{3+}}$ ion falls into a range between the longitudinal (LO) and transverse (TO) phonon mode frequencies. Simultaneously, inversion of the electronic oscillator occurs: its LO frequency becomes smaller than the TO frequency. With lowering temperature, a coupled electron–phonon mode emerges, and a new effect is observed: the reststrahlen band corresponding to a nondegenerate phonon mode splits. Yet another effect caused by the EPI is the appearance 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.
Received: August 12, 2018 Accepted: June 20, 2018
Citation:
M. N. Popova, K. N. Boldyrev, “New effects of the electron–phonon interaction in dielectrics (50th anniversary of the Institute of Spectroscopy, Russian Academy of Sciences)”, UFN, 189:3 (2019), 292–298; Phys. Usp., 62:3 (2019), 275–281
Linking options:
https://www.mathnet.ru/eng/ufn6364 https://www.mathnet.ru/eng/ufn/v189/i3/p292
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Abstract page: | 269 | Full-text PDF : | 19 | References: | 43 | First page: | 9 |
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