Phonons in Lattice and Structural Dynamics
نویسندگان
چکیده
منابع مشابه
Phonons and lattice dielectric properties of zirconia
We have performed a first-principles study of the structural and vibrational properties of the three lowpressure ~cubic, tetragonal, and especially monoclinic! phases of ZrO2, with special attention to the computation of the zone-center phonon modes and related dielectric properties. The calculations have been carried out within the local-density approximation using ultrasoft pseudopotentials a...
متن کاملLattice Vibrations – Phonons in Solid State
Phonons are quanta of lattice vibrations. They play an important role in various phenomena seen in solid state. The physics of phonons and phenomena associated with them are explored.
متن کاملthe study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
First-principles dynamics of electrons and phonons
First-principles calculations combining density functional theory and many-body perturbation theory can provide microscopic insight into the dynamics of electrons and phonons in materials. We review this theoretical and computational framework, focusing on perturbative treatments of scattering, dynamics and transport of coupled electrons and phonons. We discuss application of these first-princi...
متن کاملAb initio lattice dynamics and structural stability of MgO
Using density-functional perturbation theory, we have studied lattice dynamics, dielectric and thermodynamic properties, and P – T stability fields of the NaCl~‘‘B1’’! and CsCl~‘‘B2’’! structured phases of MgO. The results compare well with available experiments and resolve the controversy between earlier theoretical studies of the phase diagram of MgO. We predict that at all conditions of the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Advances in Condensed Matter Physics
سال: 2010
ISSN: 1687-8108,1687-8124
DOI: 10.1155/2010/627452