.

 

V. N. Popov, Two-phonon Raman bands of bilayer graphene: revisited, Carbon 91 (2015) 436-444.

V. N. Popov and Ch. van Alsenoy, Low-frequency phonons of few-layer graphene within a tight-binding model, Phys. Rev. B 90 (2014) 245429.

V. N. Popov and Ph. Lambin, Theoretical Raman fingerprints of α-, β-, and γ-graphyne, Phys. Rev. B 88 (2013) 075427/1-5.

V. N. Popov and Ph. Lambin, Theoretical 2D Raman band of strained graphene, Phys. Rev. B 87 (2013) 155425/1-7

V. N. Popov and Ph. Lambin, Theoretical Raman intensity of the G and 2D bands of strained graphene, Carbon 54 (2013) 86-93.

V. N. Popov and Ph. Lambin, Theoretical polarization dependence of the two-phonon double-resonant Raman spectra of graphene, Eur. Phys. J. B 85 (2012) 418/1-8.

D. Levshov, T. Than, R. Arenal, V. N. Popov, R. Parret, M. Paillet, V. Jourdain, A. A. Zahab, T. Michel, Yu. I. Yuzyuk, and J.-L. Sauvajol, Experimental evidence of a mechanical coupling between layers in an individual double-walled carbon nanotube, NanoLett. 11 (2011) 4800-4804.

V. N. Popov, Non-adiabatic phonon dispersion of graphene, Bulg. J. Phys. 38 (2011) 72-84.

V.N. Popov and Ph. Lambin, Non-Adiabatic Phonon Dispersion of Metallic Single-Walled Carbon Nanotubes, Nano Res. 3 (2010) 822829.

V.N. Popov and Ph. Lambin, Dynamic and charge doping effects on the phonon dispersion of graphene, Phys. Rev. B 82 (2010) 045406/1-9.

V.N. Popov, L. Henrard, and Ph. Lambin, Resonant Raman spectra of graphene with point defects, Carbon 47 (2009) 2448-2455.

A.Débarre, M. Kobylko, A.M. Bonnot, A. Richard, V.N. Popov, L. Henrard, and M. Kociak, Electronic and Mechanical Coupling of Carbon Nanotubes: A Tunable Resonant Raman Study of Systems with Known Structures, Phys. Rev. Lett. 101 (2008) 197403/1-4.

M.N. Iliev, V.G. Hadjiev, S. Jandl, V.N. Popov, D. Bonn, R. Liang, and. W.N. Hardy, Raman study of Detwinned Yba2Cu3O6.5 (Ortho-II) Single Crystals, Phys. Rev. B 77 (2008) 174302/1-5.

T. Michel, M. Paillet, J.C. Meyer, V.N. Popov, L. Henrard, and J.-L. Sauvajol, E33 and E44 optical transitions in semiconducting single-walled carbon nanotubes: Electron diffraction and Raman experiments, Phys. Rev. B 75 (2007) 155432/1-5.

M.N. Iliev, V.G. Hadjiev, A.P. Litvinchuk, F. Yen, Y.-Q. Wang, Y.Y. Sun, S. Jandl, J. Laverdière, V.N. Popov, M.M. Gospodinov, Multiple-order Raman Scattering from Rare Earth Manganites: Oxygen Isotope and Rare Earth Substitution Effects, Phys. Rev. B 75 (2007) 064303/1-5.

A. Jungen, V.N. Popov, C. Stampfer, L. Durrer, S. Stoll, and C. Hierold, Raman intensity mapping of single-walled carbon nanotubes, Phys. Rev. B 75 (2007) 041405(R)/1-4.

H. Rauf, T. Pichler, R. Pfeiffer, F. Simon, H. Kuzmany, and V.N. Popov, Detailed analysis of the Raman response of n-doped double-wall carbon nanotubes, Phys. Rev. B 74 (2006) 235419/1-10.

V.N. Popov and Ph. Lambin, Resonant Raman intensity of the totally symmetric phonons of single-walled carbon nanotubes, Phys. Rev. B 73 (2006) 165425/1-11.

V.N. Popov and Ph. Lambin, Intraband electron-phonon scattering in single-walled carbon nanotubes, Phys. Rev. B 74 (2006) 075415/1-13.

V.N. Popov and Ph. Lambin, Radius and chirality dependence of the radial-breathing mode and the G-band phonon modes of single-walled carbon nanotubes, Phys. Rev. B 73 (2006) 085407/1-9.

M. Paillet, T. Michel, J.C. Meyer, V.N. Popov, L. Henrard, S. Roth, and J.-L. Sauvajol, Raman-active phonons of identified semiconducting single-walled carbon nanotubes, Phys. Rev. Lett. 96 (2006) 257401.

M.N. Iliev, V.N. Popov, A.P. Litvinchuk, M.V. Abrashev, J. Bäckström, Y.Y. Sun, R.L. Meng, C.W. Chu, Comparative Raman Studies of Sr2RuO4, Sr3Ru2O7 and Sr4Ru3O10, Physica B 358, 138-152 (2005).

M.N. Iliev, S. Jandl, V.N. Popov, A.P. Litvinchuk, J. Cmaidalka, R.L. Meng, and J. Meen, Raman spectroscopy of Ca3Ru2O7: phonon line assignment and electron scattering, Phys. Rev. B 71 (2005) 214305/1-6.

V.N. Popov, L. Henrard, and Ph. Lambin, Electron-phonon and electron-photon interactions and resonant Raman scattering from the radial-breathing mode of single-walled carbon nanotubes, Phys. Rev. B 72 (2005) 035436/1-10.

R. Pfeiffer, F. Simon, H. Kuzmany, and V.N. Popov, Fine structure of the radial breathing mode of double-wall carbon nanotubes, Phys. Rev. B 72 (2005) 161404(R)/1-4.

Z.V. Popović, M.J. Konstantinović, V.N. Popov, A. Cantarero, Z. Dohčević-Mitrović, M. Isobe,  and Y. Ueda, Optical phonons in the NaTiSi2O6 with the S=1/2 spin chains, Phys. Rev. B 71 (2005) 224302/1-8.

M. Krause, V.N. Popov, M. Inakuma, N. Tagmatarchis, H. Shinohara, P. Georgi, L. Dunsch, and H. Kuzmany, Dynamical multipole splitting of metal-cage vibrations in crystalline endohedral D2d M2@C84 dimetallofullerenes, J. Chem. Phys. 120 (2004) 1873-1880.

Z.M. Li, V.N. Popov, and Z.K. Tang, A symmetry-adapted force-constant lattice-dynamical model for single-walled carbon nanotubes, Solid State Commun. 130 (2004) 657-661.

V.N. Popov and L. Henrard, Comparative study of the optical properties of single-walled carbon nanotubes within orthogonal and non-orthogonal tight-binding models, Phys. Rev. B 70 (2004) 115407/1-12.

V.N. Popov, Curvature effects on the structural, electronic and optical properties of isolated single-walled carbon nanotubes within a symmetry-adapted non-orthogonal tight-binding model, New Journal of Physics 6 (2004) 17/1-17.

M.N. Iliev, A.P. Litvinchuk, M.V. Abrashev, V.N. Popov, J. Cmaidalka, B. Lorenz, R.L. Meng, Phonons and Magnetic Excitations in Mott-Insulator LaTiO3, Phys. Rev. B 69 (2004) 172301/1-4.

B. Verberck, V.N. Popov, A.V. Nikolaev, and D. Lamoen, Valence electronic charge density of distorted C60  monomers in polymerized KC60 and RbC60, J. Chem. Phys. 121 (2004) 321-327.

R. Pfeiffer, Ch. Kramberger, F. Simon, H. Kuzmany, V.N. Popov, and H. Kataura, Interaction between Inner and Outer Tubes in DWCNTs, Eur. Phys. J. B 42 (2004) 345-350.

V.N. Popov, L. Henrard, and Ph. Lambin, Resonant Raman intensity of the radial breathing mode of single-walled carbon nanotubes within a non-orthogonal tight-binding model, Nano Letters 4 (2004) 1795-1799.

A.P. Litvinchuk, C.L. Chen, N. Kolev, V.N. Popov, V.G. Hadjiev, M.N. Iliev, R.P. Bontchev, and A.J. Jacobson, Optical properties of high-dielectric-constant CaCu3Ti4O12 films, phys. stat. sol. (a) 195 (2003) 453458.

V.N. Popov, Lattice dynamics of single-walled boron nitride nanotubes, Phys. Rev. B 67 (2003) 085408/1-6.

M.N. Iliev, M.V. Abrashev, V.N. Popov, and V.G. Hadjiev, Role of Jahn-Teller Disorder in Raman Scattering of Mixed-Valence Manganites, Phys. Rev. B 67 (2003) 212301/1-4.

N. Kolev, V.N. Popov, M. Gospodinov, and M.N. Iliev, Temperature-dependent polarized Raman spectra of CaFe2O4, Solid State Commun. 128 (2003) 153-155.

A.P. Litvinchuk, M.N. Iliev, V.N. Popov, and M.M. Gospodinov, Raman and infrared-active phonons in hexagonal HoMnO3 single crystals: magnetic ordering effects, J. Phys.: Cond. Matter 16 (2003) 809-819.

V.N. Popov, N.H. March, and V.E. Van Doren, Estimation of the cleavage force of crystalline semiconductors with diamond and zinc-blende structure, J. Phys. Chem. Solids 64 (2002) 159-160.

M.V. Abrashev, J. Bäckström, L. Börjesson, V.N. Popov, R.A. Chakalov,  R.L. Meng, N. Kolev, and M.N. Iliev, Raman spectroscopy of CaMnO3: mode assignment and relationship between Raman line intensities and structural distortions, Phys. Rev. B 65 (2002) 184301/1-9.

Z.V. Popović, M.J. Konstantinović, R. Gajić, V.N. Popov, M. Isobe, Y. Ueda, and V.V. Moshchalkov, Phonon Dynamics in AV2O5 (A=Na, Ca, Mg, Cs) oxides, Phys. Rev. B 65 (2002) 184303/1-8.

V.N. Popov and L. Henrard, Breathinglike phonon modes in multiwalled carbon nanotubes, Phys. Rev. B 65 (2002) 235415/1-6.

N. Kolev, C.L. Chen, M. Gospodinov, R.P. Bontchev, V.N. Popov, M.V. Abrashev, V. Hadjiev, and M.N. Iliev, Raman Spectroscopy of CaRuO3, Phys. Rev. B 66 (2002) 014101/1-4.

N. Kolev, R.P. Bontchev, A.J. Jacobson, V.N. Popov, V.G. Hadjiev, A.P. Litvinchuk, and M.N. Iliev, Raman Spectroscopy of CaCu3Ti4O12, Phys. Rev. B 66 (2002) 132102/1-4.

V.N. Popov, Low-temperature specific heat of nanotube systems, Phys. Rev. B 66 (2002) 153408/1-4.

V.N. Popov and L. Henrard, Evidence for the existence of two breathinglike phonon modes in infinite bundles of single-walled carbon nanotubes, Phys. Rev. B 63 (2001) 233407-233410.

.P. Litvinchuk, S.Y. Chen, M.N. Iliev, C.L. Chen, C.W. Chu, and V.N. Popov, Carrier Dynamics and Infrared-Active Phonons in C-axis Oriented RuSr2GdCu2O8, Physica C 361 (2001) 234-238.

V.G. Hadjiev, J. Backstrom, V.N. Popov, M.N. Iliev, R.L. Meng, Y.Y. Xue, and C.W. Chu, Symmetry of Phonons, Magnetic, and Spin-Phonon Excitations in GdSr2 RuCu2O8, Phys. Rev B 64 (2001) 134304-134309.

L. Henrard, V.N. Popov, and A. Rubio, Influence of Packing on the Vibrational Properties of Infinite and Finite Bundles of Carbon Nanotubes, Phys. Rev. B 64 (2001) 205403/1-10.

V.N. Popov, V.E. Van Doren, and M. Balkanski, Elastic properties of crystals of single-walled carbon nanotubes, Solid State Commun. 114 (2000) 395-399.

V.N. Popov, V.E. Van Doren, and M. Balkanski, Elastic properties of single-walled carbon nanotubes, Phys. Rev. B 61 (2000) 3078-3084.

.P. Litvinchuk, M.N. Iliev, Y.Y. Xue, R.L. Meng, C.W. Chu, and V.N. Popov, Optical conductivity and infrared-active phonons in RuSr2GdCu2O8, Phys. Rev. B 62 (2000) 9709-9712.

R.P. Bontchev, A.J. Jacobson, M.M. Gospodinov, V. Skumryev, V.N. Popov, B. Lorenz, R.L. Meng, A.P. Litvinchuk, and M.N. Iliev, Crystal structure, electric and magnetic properties, and Raman spectroscopy of Gd3RuO7, Phys. Rev. B 62 (2000) 12235-12240.

M.N. Iliev, A.P. Litvinchuk, H.G. Lee, C.L. Chen, L.M. Dezaneti, C.W. Chu, V.G. Ivanov, M.V. Abrashev, and V.N. Popov, Raman spectroscopy of SrRuO3 near the paramagnetic-to-ferromagnetic phase transition, Phys. Rev. B 59 (1999) 364-368.

M.V. Abrashev, A.P. Litvinchuk, M.N. Iliev, R.L. Meng, V.N. Popov, V.G. Ivanov, R.A. Chakalov, and C. Thomsen, Comparative study of optical phonons in the orthorhombically distorted perovskites LaAlO3 and LaMnO3, Phys. Rev. B 59 (1999) 4146-4153. 

V.N. Popov, V.E. Van Doren, and M. Balkanski, Lattice dynamics of single-walled carbon nanotubes, Phys. Rev. B 59 (1999) 8355-8358.

Z.V. Popović, M.J. Konstantinović, R. Gajić, V. Popov, Y.S. Raptis, A.N. Vasil'ev, M. Isobe and Y. Ueda, Lattice vibrations in spin-Peierls compound NaV2O5, Solid State Commun. 110 (1999) 381-386.

M.N. Iliev, M.V. Abrashev, H.G. Lee, V.N. Popov, Y.Y. Sun, C. Thomsen, R.L. Meng, and C.W. Chu, Raman spectroscopy of orthorhombic perovskite-like YMnO3 and LaMnO3, Phys. Rev. B 57 (1998) 2872-2877.

M.N. Iliev, M.V. Abrashev, H.G. Lee, V.N. Popov, Y.Y. Sun, C. Thomsen, T.L. Meng, C.W. Chu, Raman active phonons in orthorhombic YMnO3 and LaMnO3, J. Phys. Chem. Solids 59 (10-12) (1998) 1982-1984. 

Z.V. Popović, M.J. Konstantinović, R. Gajić, V. Popov, Y.S. Raptis, A.N. Vasil'ev, M. Isobe, and Y. Ueda, Optical phonons in spin-Peierls compound NaV2O5, J. Phys.: Condens. Matter 10 (1998), L513-L519.

M.V. Abrashev, V.N. Popov, and C. Thomsen, Raman-active phonons in the quasi-onedimensional conductor La8-xSrxCu8O20-y (x=1.6, 2.0): polarized Raman spectroscopy and lattice-dynamical calculations, J. Phys.: Condensed Matter 10 (1998) 1643-1654.

V.G. Hadjiev, M. Cardona, I. Ivanov, V. Popov, M. Gyulmezov, M.N. Iliev, and M. Berkowski, Optical phonons probe of the SrLaAlO4 crystal structure, J. Alloys and Compounds 251 (1997) 7-10. 

S.D. Dević, Z.V. Popović, V.N. Popov, G. Dhalenne, and A. Revcolevschi, Temperature dependence of Raman active modes in CuGeO3, Solid State Commun. 102 (1997) 599-604. 

M.V. Abrashev, C. Thomsen, V.N. Popov, and L.N. Bozukov, Raman spectroscopy and lattice-dynamical calculations of mixed layered copper-titanium oxides, Physica C 274 (1997) 141-148. 

M.V. Abrashev, A.P. Litvinchuk, C. Thomsen, and V.N. Popov, Optical phonons in the orthorhombic double-chain Sr1-xCaxCuO2 (x=0, 0.5), Phys. Rev. B 55 (1997) 9136-9141. 

M.V. Abrashev, A.P. Litvinchuk, C. Thomsen, and V.N. Popov, Fröhlich-interaction-induced multiphonon Raman scattering in SrCuO2 and Sr0.5Ca0.5CuO2, Phys. Rev. B 55 (1997) R8638-R8641.

M.N. Iliev, H.G. Lee, V.N. Popov, M.V. Abrashev, H. Hamed, R.L. Meng, and C.W. Chu, Raman- and infrared-active phonons in hexagonal YMnO3: Experiment and lattice-dynamical calculations, Phys. Rev. B 56 (1997) 2488-2494.

M.V. Abrashev and V.N. Popov, Raman-active phonons in La4BaCu5O13: polarized Raman spectroscopy and lattice dynamical calculations, J. Phys.: Condens. Matter 7 (1995) 4967-4973.

V.N. Popov, Shell Model Parameters for Layered Copper Oxides, J. Phys.: Condens. Matter 7 (1995) 1625-1638.

Z.V. Popović, S.D. Dević, V.N. Popov, G. Dhalenne, and A. Revcolevschi, Phonons in CuGeO3 studied using polarized far-infrared and Raman-scattering spectroscopy, Phys. Rev. B 52 (1995) 4185-4190.

Y.K. Atanassova, V.N. Popov, G.G. Bogachev, M.N. Iliev, C. Mitros, V. Psycharis, and M. Pissas, Raman and Infrared-active Phonons in YBaCuFeO5: Experiment and Lattice Dynamics, Phys. Rev. B 47 (1993) 15201-15207.

G.A. Zlateva, V.N. Popov, M. Gyulmezov, L.N. Bozukov, and M.N. Iliev, Phonons in Ca2-xSrxCuO3 (x=0, 0.2 and 0.4): Raman and Infrared Spectroscopy, and Lattice Dynamics Calculations, J. Phys.: Condens. Matter 4 (1992) 8543-8550. 

V.N. Popov and V. Valchinov, Phonon Spectra of the Nd-Ce-Cu-O Superconductor, Physica C 172 (1990) 260-264.

I.Z. Kostadinov V.G. Hadjiev, J. Tihov, M. Mateev, M. Mikhov, O. Petrov, V. Popov, E. Dinolova, Ts. Zheleva, G. Tyuliev and V. Kojouharov, Structural Study, XPS and Raman Spectra of 107 and 114 K Tl Based Superconductors, Physica C 156 (1988) 427-433.

 

V.N. Popov and Ph. Lambin, Vibrational properties of carbon nanotubes, in: Carbon Nanotubes: From Basic Research to Nanotechnology, eds. V. N. Popov and Ph. Lambin, NATO Series II: Mathematics, Physics and Chemistry, Vol. 222, Amsterdam, Springer, 2006, pp. 69-88.

V.N. Popov and M. Balkanski, Lattice dynamics of carbon nanotubes, in: Current Topics in Physics. In Honor of Sir Roger J. Elliott. R. A. Barrio & K. K. Kaski (Eds.), Imperial College Press, 2005, 113-150.

V.N. Popov and Ph. Lambin, Electronic and Vibrational Properties of Single-Walled Carbon Nanotubes, Bulg. J. Phys. 25 (2005) 237-256.  

V.N. Popov, Carbon nanotubes: properties and application, Mater. Science Eng. R 43 (2004) 61-102.

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