V
V. G. Ivanov
Researcher at Sofia University
Publications - 45
Citations - 968
V. G. Ivanov is an academic researcher from Sofia University. The author has contributed to research in topics: Raman spectroscopy & Raman scattering. The author has an hindex of 16, co-authored 44 publications receiving 825 citations. Previous affiliations of V. G. Ivanov include University of Nantes & Georgi Nadjakov Institute of Solid State Physics.
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Comparative study of optical phonons in the rhombohedrally distorted perovskites LaAlO 3 and LaMnO 3
Miroslav Abrashev,Alexander P. Litvinchuk,Milko Iliev,R. L. Meng,Valentin N. Popov,V. G. Ivanov,R. A. Chakalov,Christian Thomsen +7 more
TL;DR: In this article, the Raman and infrared phonons of isostructural rhombohedral structures were studied at room temperature and the experimental spectra were compared with the prediction of lattice-dynamical calculations and the lines observed are assigned to definite atomic vibrations.
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Short-range B -site ordering in the inverse spinel ferrite NiFe 2 O 4
TL;DR: In this paper, the number of experimentally observed Raman modes exceeds the expected number for a normal spinelstructure and the polarization properties of most of the Raman lines provide evidence for a micro-scopic symmetry lower than that given by the Fd¯3m space group.
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Raman spectroscopy of SrRuO 3 near the paramagnetic-to-ferromagnetic phase transition
Milko Iliev,Alexander P. Litvinchuk,H.-G. Lee,Chonglin Chen,M. L. Dezaneti,Ching-Wu Chu,V. G. Ivanov,Miroslav Abrashev,Valentin N. Popov +8 more
TL;DR: In this article, the polarized Raman spectra of (010)- and (001)-oriented epitaxial thin films of the space group $Pnma,$ $Z=4$ are measured between 5 and 300 K.
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Comparative Raman study of isostructural YCrO 3 and YMnO 3 : Effects of structural distortions and twinning
N. D. Todorov,Miroslav Abrashev,V. G. Ivanov,Gichka G. Tsutsumanova,Vera Marinova,Y. Q. Wang,Milko Iliev +6 more
TL;DR: Abrashev et al. as mentioned in this paper proposed a method to solve the problem of superconductivity in the Bulgarian optical materials and technologies (OFT) domain. But their method was not suitable for the Bulgarian environment.
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Reflectivity modification of polymethylmethacrylate by silicon ion implantation
TL;DR: In this paper, the effect of silicon ion implantation on the optical reflection of bulk polymethylmethacrylate (PMMA) was examined in the visible and near UV, and it was shown that a significant enhancement of the reflectivity from Si + -implanted PMMA occurs at appropriate implantation energy and fluence.