145 citations · 427 across the 25 of their papers we have counts for
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Effect of External Normal and Parallel Electric Fields on 180^o Ferroelectric Domain Walls in PbTiO_3
Arzhang Angoshtari, Arash Yavari
We impose uniform electric fields both parallel and normal to 180^o ferroelectric domain walls in PbTiO_3 and obtain the equilibrium structures using the method of anharmonic latti…
Atomic Structure of Steps on 180^o Ferroelectric Domain Walls in PbTiO_3
Arzhang Angoshtari, Arash Yavari
Using the method of anharmonic lattice statics, we calculate the equilibrium structure of steps on 180^o ferroelectric domain walls (DW) in PbTiO_3. We consider three different typ…
Structure of Defective Crystals at Finite Temperatures: A Quasi-Harmonic Lattice Dynamics Approach
Arash Yavari, Arzhang Angoshtari
In this paper we extend the classical method of lattice dynamics to defective crystals with partial symmetries. We start by a nominal defect configuration and first relax it static…
Finite-Temperature Atomic Structure of 180^o Ferroelectric Domain Walls in PbTiO3
Arzhang Angoshtari, Arash Yavari
In this letter we obtain the finite-temperature structure of 180^o domain walls in PbTiO3 using a quasi-harmonic lattice dynamics approach. We obtain the temperature dependence of…
Estimating Terminal Velocity of Rough Cracks in the Framework of Discrete Fractal Fracture Mechanics
Arash Yavari, Hamed Khezrzadeh
In this paper we first obtain the order of stress singularity for a dynamically propagating self-affine fractal crack. We then show that there is always an upper bound to roughness…
Effect of strain and oxygen vacancies on the structure of 180^o ferroelectric domain walls in PbTiO_3
Arzhang Angoshtari, Arash Yavari
In this paper we study the effect of normal and shear strains and oxygen vacancies on the structure of 180^o ferroelectric domain walls in PbTiO_3. It is known that oxygen vacancie…