Raman study of Twin Free YBa$_2$Cu$_3$O$_{6.5}$ (Ortho-II) Single Crystals (2008)
Iliev, M. N., Hadjiev, V. G., Jandl, S., Boeuf, D. Le, Popov, V. N., Bonn, D., ...
The polarized Raman scattering spectra from freshly cleaved $ab$, $ac$, and $bc$ surfaces of high quality twin free YBa$_2$Cu$_3$O$_{6.5}$ (Ortho-II) single crystals ($T_c$=57.5 K and $\Delta T =...
Raman Active Phonons of Identified Semiconducting Single-Walled Carbon Nanotubes (2006)
Paillet, M., Michel, T., Meyer, J. C., Popov, V. N., Henrard, L., Roth, S., ...
Fine Structure of the Radial Breathing Mode in Double-Wall Carbon Nanotubes (2005)
Pfeiffer, R., Simon, F., Kuzmany, H., Popov, V. N.
The analysis of the Raman scattering cross section of the radial breathing modes of double-wall carbon nanotubes allowed to determine the optical transitions of the inner tubes. The Raman lines are...
Comparative Raman Studies of Sr2RuO4, Sr3Ru2O7 and Sr4Ru3O10 (2004)
Iliev, M. N., Popov, V. N., Litvinchuk, A. P., Abrashev, M. V., Backstrom, J., Sun, Y. Y., ...
The polarized Raman spectra of layered ruthenates of the Srn+1RunO3n+1 (n=1,2,3) Ruddlesden-Popper series were measured between 10 and 300 K. The phonon spectra of Sr3Ru2O7 and Sr4Ru3O10 confirmed...
Interaction between concentric Tubes in DWCNTs (2004)
Pfeiffer, R., Kramberger, Ch., Simon, F., Kuzmany, H., Popov, V. N., Kataura, H.
A detailed investigation of the Raman response of the inner tube radial breathing modes (RBMs) in double-wall carbon nanotubes is reported. It revealed that the number of observed RBMs is two to...
Litvinchuk, A. P., Iliev, M. N., Popov, V. N., Gospodinov, M. M.
Polarized Raman scattering and infrared reflection spectra of hexagonal HoMnO$_3$ single crystals in the temperature range 10-300 K are reported. Group-theoretical analysis is performed and...
Phonons and Magnetic Excitations in Mott-Insulator LaTiO$_3$ (2003)
Iliev, M. N., Litvinchuk, A. P., Abrashev, M. V., Popov, V. N., Cmaidalka, J., Lorenz, B., ...
The polarized Raman spectra of stoichiometric LaTiO$_3$ (T$_N = 150$ K) were measured between 6 and 300 K. In contrast to earlier report on half-metallic LaTiO$_{3.02}$, neither strong background...
Temperature-Dependent Polarized Raman Spectra of CaFe2O4 (2003)
Kolev, N., Iliev, M. N., Popov, V. N., Gospodinov, M.
The Raman spectra of CaFe2O4 were measured with several exact scattering configurations between 20 and 520K and the symmetry of all observed Raman lines was determined. The Ag and B2g lines were...
Iliev, M. N., Abrashev, M. V., Popov, V. N., Hadjiev, V. G.
The mixed-valence perovskitelike manganites are characterized by unique interrelation of Jahn-Teller distortions, electric and magnetic properties. The Jahn-Teller distortion follows the...
Balashov,I. F., Bondarenko,E. G., Ermakov,B. A., Popov,V. N.
Investigation into the sensitivity of photocells was made by using fiber amplifiers. A core with a diameter of 30 micrometers and a casing, made from samarium glass with a diameter of 1 mm was used...
Carrier dynamics and infrared-active phonons in c-axis oriented RuSr$_2$GdCu$_2$O$_8$ film (2001)
Litvinchuk, A. P., Chen, S. Y., Iliev, M. N., Chen, C. L., Chu, C. W., Popov, V. N.
The conductivity spectra of c-axis oriented thin RuSr$_2$GdCu$_2$O$_8$ film on SrTiO$_3$ substrate, prepared by pulsed-laser deposition, are obtained from the analysis of the reflectivity spectra...
Equation of the State of a Helium and Nitrogen Mixture, (1998)
The equation of state describing the experimental data within the temperature range of 273.15 to 773.15K and a pressure up to 400 bars was obtained with respect to the compressibility of helium,...
Tsederberg, N. V., Popov, V. N., Morozova, N. A.
Helium is being used in nuclear power plants as a working substance. The increasing introduction of nuclear power into the national economy requires most accurate data on the properties of helium. A...
Gauge fields / N. P. Konoplevva and edited by NN. M. Queen (1981)
Konopleva, N. P. (Nelli Pavlovna), Popov, V. N. (Viktor Nikolaevich), Queen, N. M
Traducción de: Kalibrovochye polia
Magnetic and Superconductive States in the Repulsive Hubbard Model (1970)
. It is demonstrated that antiferromagnetic, ferromagnetic and superconductive states can exist in the repulsive Hubbard model. The meaning of small denominators of Green's functions and of the Van...