
T (+98) 23 352 20220
Email: international@du.ac.ir
Damghan University
University Blvd, Damghan, IR
Vice President for Education and Postgraduate Studies and Professor of Condensed Matter Physics
Dr. Vali was born in Bojnourd, North Khorasan, Iran. He received undergraduate degrees in applied physics (Solid State Physics) from Shahid Beheshti University, Tehran, Iran (1992) and in Solid State Physics from Tabriz University, East Azerbaijan, Iran (1994). He earned a Ph.D. in Theoretical Condensed Matther Physics from Ferdowsi University of Mashhad, Khorasan-E-Razavi, Iran (2004). He then held faculty position at the Damghan University, Semnan, Iran.
His Administrative portfolio includes but doesn't limited to dean of school of physics, and vice president for administrative and financial affairs. He is currently vice president for education and postgraduate studies from 2016 and full professor of condensed matter physics in Damghan university.
His research area lies in the field of Investigation of electronic, dynamical and dielectric properties of materials, using density functional theory and density functional perturbation theory; Quantum transport in mesoscopic systems; Topological Insulators; Spintronics; Nanoelectronics;
Book:
Journal Papers
Vali, R. First principles phonon calculations of dielectric properties in Ba2MWO6 (M = Mg, Zn) (2016) 122, pp. 146-149. Cited 1 time.
DOI: 10.1016/j.commatsci.2016.05.017
AUTHOR KEYWORDS: Dielectric intensities; Double perovskite tungstates; Vibrational frequencies
INDEX KEYWORDS: Calculations; Density functional theory; Dielectric properties; Perovskite; Perturbation techniques; Phonons; Vibrational spectra, Density functional perturbation theory; Double perovskites; Effective charge; First principles; Infrared-active phonon; Phonon calculation, Barium compounds
PUBLISHER: Elsevier B.V.
Vali, R., Khouzestani, H.F. Crossed Andreev reflection in topological insulator F/d-wave SC/F junction (2015) 68, pp. 107-111. Cited 2 times.
DOI: 10.1016/j.physe.2014.12.018
AUTHOR KEYWORDS: Andreev reflection; Crossed; Ferromagnet/d-wave superconductor/ferromagnet junction; Topological insulator
INDEX KEYWORDS: Electric insulators; Ferromagnetic materials; Ferromagnetism; Magnetization; Magnets; Superconducting materials, Andreev reflection; Crossed; Crossed Andreev reflections; Elastic cotunneling; Ferromagnets; In-plane magnetization; Magnetization configuration; Topological insulators, Bias voltage
PUBLISHER: Elsevier
DOI: 10.1016/j.ssc.2014.02.004
AUTHOR KEYWORDS: A. Topological insulator; D. Conductance; D. Magnetoresistance
INDEX KEYWORDS: Antiparallel magnetizations; Coherent conductance; Crossed Andreev reflections; Elastic cotunneling; Ferromagnet/superconductor/ferromagnet junction; Perpendicular magnetization; Superconductor layers; Topological insulators, Electric insulators; Magnetization, Magnetoresistance
Vali, R., Khouzestani, H.F. Nonlocal transport properties of topological insulator F/I/SC/I/F junction with perpendicular magnetization (2014) 87 (1), art. no. 25, pp. 1-6. Cited 5 times.
DOI: 10.1140/epjb/e2014-40872-3
AUTHOR KEYWORDS: Mesoscopic and Nanoscale Systems
INDEX KEYWORDS: Ferromagnetic materials; Ferromagnetism; Locks (fasteners); Magnetization; Magnets; Superconducting materials; Transport properties, Antiparallel alignment; Exchange fields; Mesoscopic and nanoscale systems; Perpendicular magnetization; Quantum switch; Spin momentum; Topological insulators; Vector potential, Electric insulators
PUBLISHER: Springer Heidelberg
AUTHOR KEYWORDS: Dirac bogoliubov-de gennes equation; Nonlocal conductance; Topological insulator
INDEX KEYWORDS: Ferromagnetic materials; Ferromagnetism; Magnetization; Quantum computers, Bogoliubov-de Gennes equations; Crossed Andreev reflections; Elastic cotunneling; Ferromagnetic regions; Magnetization vector; Nonlocal; Switching properties; Topological insulators, Electric insulators, quantum mechanics; topology
PUBLISHER: Sharif University of Technology
DOI: 10.1063/1.4815881
INDEX KEYWORDS: Andreev reflection; Bogoliubov-de Gennes equations; Ferromagnetic layers; Ferromagnets; Gate voltages; In-plane magnetization; Lower critical; Topological insulators, Electric insulators; Magnetization, Magnetoresistance
Vali, R., Vali, M. Tunneling conductance and magnetoresistance in topological insulator Fi/I/Fi/d-wave superconductor junctions (2012) 112 (10), art. no. 103919, . Cited 10 times.
DOI: 10.1063/1.4766286
INDEX KEYWORDS: Antiparallel magnetizations; Ferromagnetic insulator; Ferromagnetic layers; Oscillatory behaviors; Parallel conductance; Superconductor junctions; Topological insulators; Tunneling conductance; Tunneling magnetoresistance, Electric insulators; Ferromagnetic materials; Ferromagnetism; Magnetoresistance; Scanning tunneling microscopy; Superconductivity, Superconducting materials
DOI: 10.1063/1.4759250
INDEX KEYWORDS: Conductance peaks; Conductance properties; Ferromagnetic insulator; Ferromagnetic regions; Gate voltages; Normal metals; Superconductor junctions; Topological insulators; Zero-bias conductance, Electric insulators; Ferromagnetic materials; Ferromagnetism; Magnetization; Superconducting materials, Superconductivity
Vali, R., Vali, M. Tunneling transport in topological insulator normal metal/insulator/d-wave superconductor junctions (2012) 24 (32), art. no. 325702, . Cited 5 times.
DOI: 10.1088/0953-8984/24/32/325702
INDEX KEYWORDS: Gate voltages; Maximum values; Normal metals; Oscillatory behaviors; Resonant condition; Superconductor junctions; Topological insulators; Tunneling conductance, Electric insulators; Resonant tunneling; Superconducting materials; Superconductivity, Scanning tunneling microscopy
DOI: 10.1016/j.commatsci.2011.04.018
INDEX KEYWORDS: Dielectric functions; Electronic band structure; Experimental data; Imaginary parts; Phonon spectrum; Theoretical result, Electronic properties; Electronic structure; Local density approximation, Phonons
DOI: 10.1016/j.commatsci.2011.03.017
AUTHOR KEYWORDS: Electronic band structure; Infrared reflectivity; Raman intensity; YF3
INDEX KEYWORDS: Active mode; Density functional perturbation theory; Electronic band structure; Infrared and Raman spectra; Infrared reflectivity; Nonresonant; Raman active modes; Raman intensity; Raman spectra; YF3; Yttrium trifluoride, Band structure; Electron mobility; Perturbation techniques; Raman scattering; Raman spectroscopy; Reflection; Yttrium, Density functional theory
DOI: 10.1016/j.ssc.2010.10.012
AUTHOR KEYWORDS: A. Ferromagnetic semiconductors; A. Quantum point contacts; D. Spin filtering
INDEX KEYWORDS: Cross section; D. Spin filtering; Ferromagnetic semiconductor; Quantum point contact; Spin filtering; Spin orientations; Spin polarized transport; Spin splittings; Spin-dependent transport properties, Ferromagnetic materials; Ferromagnetism; Point contacts; Spin polarization; Transport properties, Quantum chemistry
DOI: 10.1016/j.ssc.2009.08.027
AUTHOR KEYWORDS: A. Diluted magnetic semiconductor; D. Rashba spin-orbit coupling; D. Tunnelling magnetoresistance
INDEX KEYWORDS: A. Diluted magnetic semiconductor; Barrier structures; D. Rashba spin-orbit coupling; D. Tunnelling magnetoresistance; Diluted magnetic semiconductors; Double-barrier structures; Rashba spin-orbit coupling; Spin dependent transport; Spin polarized transport; Tunnelling magnetoresistance, Electric resistance; Magnetic semiconductors; Magnetism; Magnetoelectronics; Magnetoresistance; Orbits; Semiconductor quantum wires; Spin dynamics; Spin polarization; Tunneling (excavation); Wind tunnels, Magnetic field effects
Vali, R. Ab initio vibrational and dielectric properties of Y V O4 (2009) 149 (39-40), pp. 1637-1640. Cited 7 times.
DOI: 10.1016/j.ssc.2009.06.036
AUTHOR KEYWORDS: A. Y V O4; D. IR reflectivity spectra; D. Phonons
INDEX KEYWORDS: A. Y V O4; Ab initio; D. IR reflectivity spectra; D. Phonons; Density functional perturbation theory; Dielectric tensors; Experimental data; IR reflectivity; Phonon mode; Raman active modes; Raman data; Yttrium orthovanadate; Zircon-type structures, Density functional theory; Dielectric properties; Perturbation techniques; Reflection; Silicate minerals; Yttrium; Zircon, Phonons
Vali, R. Lattice dynamics of room temperature orthorhombic SrHfO3 (2009) 149 (13-14), pp. 519-522. Cited 17 times.
DOI: 10.1016/j.ssc.2009.01.012
AUTHOR KEYWORDS: A. SrHfO3; D. IR reflectivity spectra; D. Lattice dynamics; D. Phonon modes
INDEX KEYWORDS: Anisotropy; Crystal lattices; Density functional theory; Infrared spectroscopy; Lattice vibrations; Perturbation techniques; Phonons; Programming theory; Reflection; Solids, A. SrHfO3; D. IR reflectivity spectra; D. Lattice dynamics; D. Phonon modes; Density functional perturbation theories; Dielectric constants; Infrared reflectivity spectrum; Orthorhombic phase; Oscillator strengths; Room temperatures; Theoretical results; Zone-center phonons, Dynamics
Vali, R. Phonons and heat capacity of LaAlO3 (2008) 44 (2), pp. 779-782. Cited 11 times.
DOI: 10.1016/j.commatsci.2008.05.029
AUTHOR KEYWORDS: Ab initio calculations; Heat capacity; LaAlO3; Phase transitions; Phonon dispersion relations; Phonons
INDEX KEYWORDS: Acoustic dispersion; Density functional theory; Dispersion (waves); Lanthanum alloys; Perturbation techniques; Phase stability; Phonons; Quantum theory; Specific heat; Stability; Strain measurement, Ab initio calculations; Density functional perturbation theories; Dynamical stabilities; Heat capacities; Heat capacity; LaAlO3; Phonon dispersion curves; Phonon dispersion relations; Phonon dispersions; Pseudo potentials; Rhombohedral phase; Rhombohedral phases; Soft modes; Wave expansions, Phase transitions
Vali, R. Structural phases of SrHfO3 (2008) 148 (1-2), pp. 29-31. Cited 28 times.
DOI: 10.1016/j.ssc.2008.07.018
AUTHOR KEYWORDS: C. Crystal structure; D. Phase transitions; D. Phonons
INDEX KEYWORDS: Structural design, C. Crystal structure; D. Phase transitions; D. Phonons; Structural phases, Structural optimization
DOI: 10.1016/j.physe.2008.05.005
AUTHOR KEYWORDS: Multiple stub; Quantum wire; Spin transport
INDEX KEYWORDS: Nanostructures; Nanowires; Quantum chemistry; Quantum electronics; Semiconductor quantum dots; Semiconductor quantum wires; Wire, Forbidden bands; Multiple stub; Quantum wire; Quantum wires; Spin polarizations; Spin transport; Spin transports; Spin-dependent transmission; Spin-down; Spin-up; Square waves; T-shaped; Transmission coefficients, Spin dynamics
Vali, R. Lattice dynamics and electronic properties of the scintillator host material: Barium hafnate (2008) 147 (1-2), pp. 1-3. Cited 20 times.
DOI: 10.1016/j.ssc.2008.04.035
AUTHOR KEYWORDS: D. Electronic band structure; D. Light output; D. Phonons
INDEX KEYWORDS: Barium compounds; Density functional theory; Electronic properties; Lattice vibrations, Barium hafnate; Host materials, Phosphors
Vali, R. Lattice dynamics of cubic SrZrO3 (2008) 69 (4), pp. 876-879. Cited 17 times.
DOI: 10.1016/j.jpcs.2007.09.022
AUTHOR KEYWORDS: A. Oxides; C. Ab initio calculations; D. Lattice dynamics; D. Phonons
INDEX KEYWORDS: Brillouin scattering; Crystal symmetry; Density functional theory; Lattice vibrations; Permittivity; Perturbation techniques; Phonon scattering, Ab initio calculations; Cubic Brillouin; Optical dielectric constants; Phonon dispersions, Strontium compounds
Vali, R. Band structure and dielectric properties of orthorhombic SrZrO3 (2008) 145 (9-10), pp. 497-501. Cited 22 times.
DOI: 10.1016/j.ssc.2007.12.009
AUTHOR KEYWORDS: A. SrZrO3; D. Band structure; D. Dielectric constant; D. Phonon modes
INDEX KEYWORDS: Density functional theory; Permittivity; Perovskite; Phonons; Strontium compounds; Vibration analysis, Electronic band structure; Phonon modes; Vibrational modes, Band structure
Vali, R. Spin filtering through Cd1-yMgyTe/Cd1-xMnxTe heterostructure (2008) 40 (3), pp. 637-642. Cited 2 times.
DOI: 10.1016/j.physe.2007.08.076
AUTHOR KEYWORDS: Cd1-yMgyTe/Cd1-xMnxTe heterostructure; Diluted magnetic semiconductors; Spin filtering
INDEX KEYWORDS: Cadmium; Conduction bands; Current density; Magnetic field effects; Magnetic semiconductors; Spin polarization, Diluted magnetic semiconductors; Spin filtering; Transmission coefficients, Heterojunctions
Vali, R. Vibrational, dielectric and scintillation properties of YAlO3 (2007) 127 (2), pp. 727-730. Cited 9 times.
DOI: 10.1016/j.jlumin.2007.04.009
AUTHOR KEYWORDS: Dielectric permittivity; Phonon modes; Scintillation; YAlO3
INDEX KEYWORDS: Density functional theory; Mathematical models; Permittivity; Perturbation techniques; Scintillation, Density functional perturbation theory; Dielectric permittivity; Phonon frequencies; Phonon modes, Yttrium compounds
Vali, R. Electronic, dynamical, and dielectric properties of lanthanum oxysulfide (2006) 37 (3), pp. 300-305. Cited 15 times.
DOI: 10.1016/j.commatsci.2005.08.007
AUTHOR KEYWORDS: Born effective charge; Density-functional theory; Dielectric permittivity; Electronic band structure; La2O2S; Phonon modes
INDEX KEYWORDS: Band structure; Dielectric properties; Electronic structure; Permittivity; Perturbation techniques; Probability density function, Born effective charge; Dielectric permittivity; Electronic band structure; La2O2S; Phonon modes, Lanthanum compounds
Vali, R., Hosseini, S.M. First-principles study of structural, dynamical, and dielectric properties of A-La2O3 (2004) 31 (1-2), pp. 125-130. Cited 20 times.
DOI: 10.1016/j.commatsci.2004.02.003
AUTHOR KEYWORDS: A-La2O3; Density-functional theory; Dielectric permittivity tensors; Gate-dielectric
INDEX KEYWORDS: Crystal structure; Decomposition; Electron gas; Fourier transforms; Ions; Parameter estimation; Permittivity; Phonons; Probability density function; Reaction kinetics; Thermodynamic stability, Dielectric permittivity tensors; Gate-dielectrics; Structural parameters; Structural relaxation, Materials science
Vali, R., Hosseini, S.M. First-principles study of structural, dynamical, and dielectric properties of κ-Al2O3 (2004) 29 (2), pp. 138-144. Cited 12 times.
DOI: 10.1016/j.commatsci.2003.06.009
AUTHOR KEYWORDS: κ-Al2O3; Density-functional theory; Dielectric permittivity tensors; Gate-dielectric
INDEX KEYWORDS: Amorphous alloys; Brillouin scattering; Crystal structure; Dielectric properties; Ionic conduction; Tensors, Density functional theory (DFT); Dielectric permittivity tensors, Alumina