Ֆիզիկայի ֆակուլտետ
Faculty of Physics
The process of training specialists in the field of physics and mathematics began in 1922 in YSU.:
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Vadim R. Ohanyan

Senior Researcher | Faculty of Physics
Education
1993-1998. Department of Physics, Yerevan State University

Academic degree
Phd

Academic courses
Classical Electrodynamics, Thermodynamics and Statistical Physics, Phase transitions and critical phenomena

Scale of professional interests
Superconductivity, coherent states, physics classical and quantum field theories

Professional membership
Statistical Mechanics, Quantum Field Theory, Mathematical Physicsparticular fields: Integrable Models, Strongly Correlated Systems, Theory of Magnetism current topics: Magnetocaloric Effect in Integrable Models
Microscopic exactly solvable models of magnetoelectric effect,
Exact solutions of the spin lattice models with mixed Heisenberg and Ising bonds

Awards received
RA President’s Prize in Physics, 2011

O. Menchyshyn, V. Ohanyan , T. Verkholyak, T. Krokhmalskii, O. Derzhko
Magnetism-driven ferroelectricity in spin-1/2 XY chains
2015 | Article
Phys. Rev. B 92, 184427 (2015)
V. Ohanyan , O. Rojas, J. Strecka, S. Bellucci
Absence of actual plateaus in zero-temperature magnetization curves of quantum spin clusters and chains
2015 | Article
Phys. Rev. B 92, 214423 (2015)
S. Bellucci, V. Ohanyan , O. Rojas
Magnetization non-rational quasiplateau and spatially modulated spin order in the model of the single-chain magnet, [{(CuL)2Dy}{Mo(CN)8}] • 2CH3CN • H2O
2014 | Article
EPL 105, 47012, 2014
E.Gevorgyan, A.Nersessian , V.Ohanyan , E.Tolkachev
Landau problem on the ellipsoid, hyperboloid and paraboloid of revolution
2014 | Article
Mod. Phys. Lett. A 29 (2014) 1450148
M. Brockmann, A. Kl¨umper, V. Ohanyan
Exact description of the magnetoelectric effect in the spin-1/2 XXZ-chain with Dzyaloshinskii-Moriya interaction
2013 | Article
Phys. Rev. B 87, 054407, 2013
S. Bellucci, V. Ohanyan
Correlation functions in one-dimensional spin lattices with Ising and Heisenberg bonds
2013 | Article
Eur. Phys. J. B 86, 446, 2013
V. Ohanyan , A. Honecker
Magneto-thermal properties of the Heisenberg-Ising orthogonal-dimer chain with triangular XXZ-clusters
2012 | Article
Phys. Rev. B 86, 054412, 2012
M.Topilko, T. Krokhmalskii, O. Derzhko , V. Ohanyan
Magnetocaloric effect in spin-1/2 XX chains with three-spin interactions
2012 | Article
Eur. Phys. J. B 85, 278, 2012
O. Rojas, S. M. de Souza, V. Ohanyan , M. Khurshudyan
Exactly solvable model of Ising-Heisenberg diamond-chain with S = 1 XXZ vertical dimers with additional biquadratic interactions and single-ion anisotropy
2011 | Article
Phys. Rev. B 83, 094430, 2011
C. Trippe, A. Honecker, A. Kl¨umper, V. Ohanyan
Exact calculation of the magnetocaloric effect in the spin-1/2 XXZ chain
2010 | Article
Phys. Rev. B 81, 054402, 2010
Phase diagrams of the Ising–Heisenberg chain with S=1/2 triangular XXZ clusters
2010 | Article
Phys. Atom. Nucl. 73, 494, 2010
S. Bellucci, V. Ohanyan
Lattice distortions in sawtooth chain with Heisenberg and Ising bonds
2010 | Article
Eur. Phys. J.B 75, 531, 2010
D. Antonosyan, S. Bellucci , V. Ohanyan
Exactly solvable Ising–Heisenberg chain with triangular XXZ-Heisenberg plaquettes
2009 | Article
Phys. Rev. B 79, 014432, 2009
Antiferromagnetic sawtooth chain with Heisenberg and Ising bonds
2009 | Article
Condensed Matter Physics, 12, 343, 2009
Multi-center MICZ-Kepler systems
2008 | Article
Theor. Math. Phys. 155(1), 618, 2008
S. Bellucci, V. Ohanyan
Two–center quantum MICZ–Kepler system and Zeeman effect in the charge-dyon system
2008 | Article
Phys. Lett. A 372, 5765, 2008
Գերհաղորդիչ նյութերի ջերմունակության թույլ արտահայտված առանձնահատկությունները և դրանց կապը SFCO մեթոդով դիտված պարամագնիսական երևույթի հետ
2008 | Article
ԵՊՀ Գիտական տեղեկագիր, Բնական գիտություններ, 2008, #3, էջ 82-90
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Peculiarities of a specific heat of superconductors: their relation to the paramagnetic effect detected by an OF Cbased test-method in SOLID STATE PHYSICS
2007 | Article
in SOLID STATE PHYSICS Proceedings of the Conference dedicated to 50-th anniversary of the foundation of the Department of Solid State Physics of YSU, p. 125, 2007 (in armenian)
V.R.Ohanyan , L.N.Ananikyan , N.S.Ananikian
An exact solution on the ferromagnetic Face-Cubic spin model on a Bethe lattice
2007 | Article
Physica A 377, 501, 2007
Multi-center MICZ-Kepler system, supersymmetry and integrability
2007 | Article
Phys. Rev. D 75, 085002, 2007
V.R.Ohanyan , N.S.Ananikian
Magnetization plateaux in the Ising limit of the multiple-spin exchange model on plaquette chain
2005 | Article
in MATHEMATICAL PHYSICS Proceedings of the XI Regional Conference Tehran, Iran 2004 ed. by S Rahvar, N Sadooghi and F Shojai,p.49-51 (World Scientific) (2005)[arXiv:/condmat 0612630]
T.A.Arakelyan, V.R.Ohanyan , L.N.Ananikyan, N.S.Ananikian
The multisite interaction Ising model approach to Solid 3He system on the triangulyar lattice
2003 | Article
Phys. Rev. B 67, 024424, 2003
V.R.Ohanyan , N.S.Ananikian
Magnetization plateaus in the ferromagnetic – ferromagnetic–antiferromagnetic Ising chain
2003 | Article
Phys. Lett. A 307, 76, 2003
N.S.Ananikian, V.R.Ohanyan
Ferromagnetic reduced N-vector model with a cubic symmetry on the Bethe lattice
2003 | Article
J.Contemp. Phys. 38, 8, 2003
N.S.Ananikian, V.R.Ohanyan
Ferromagnetic reduced N-vector model with a cubic symmetry on the Bethe lattice
2003 | Article
J.Contemp. Phys. 38, 8, 2003
The SU(2) WZNW model on manifolds with boundary
2000 | Article
J.Contemp. Phys. 35, 5, 2000