Optical parametric oscillators are one of the building pillars nonlinear and quantum optics, basis minimum-uncertainty states entangled photon pairs. Transferring similar ideas to mechanical vibrations, authors demonstrate an optomechanical oscillator based on a lattice traps that confine couple fluids light sound. Nonresonant continuous laser excitation leads 20 GHz self-induced oscillations p...

Electron-lattice interactions are often considered not to play a major role in material’s properties as they are assumed to be small, the second-order effects. This study, however, shows the importance of taking these effects into account in the simulations. My results demonstrate the impact of the electron-lattice interaction on the physics of the material and our understanding from it. One wa...

Abstract In an attempt to explain flash sintering experiments, it had been proposed that the electron–phonon coupling leads a proliferation of short wave-length lattice vibrations in electric field. this paper we investigate by solving two coupled Boltzmann equations, describing free electron gas field scattering from crystal heat bath. The imposes cylindrical symmetry and drives electrons phon...

In this study, Bio-based carbon nanotubes (CNTs) have received considerable research attention due to their comparative advantages of high level stability, simplistic use, low toxicity and overall environmental friendliness. New potentials for improvement in heat transfer applications are presented due to their high aspect ratio, high thermal conductivity and special surface area. Phonons have ...

The effect of deformation on the excitation of multiple giant dipole resonances is studied. Analytical expressions are derived in the framework of the interacting boson model for the energies and E1 properties of giant dipole resonances in spherical and deformed nuclei, and a numerical treatment of transitional nuclei is proposed. Coulomb-excitation cross sections are calculated in 238U and in ...

Interactions of charge carriers with lattice vibrations, or phonons, play a critical role in unconventional electronic transport metals and semimetals. Recent observations phonon-mediated collective electron flow bulk semimetals, termed hydrodynamics, present new opportunities the search for strong electron-electron interactions high carrier density materials. Here we general signatures such se...

Elemental gallium can exist in several phases under ambient pressure. The stable $\ensuremath{\alpha}$ phase has a superconducting transition temperature, ${T}_{c}$, of 0.9 K. By contrast, the ${T}_{c}$ metastable $\ensuremath{\beta}$ is around 6 To understand significant improvement phase, we first calculate electronic structure, phonon dispersion, and electron-phonon coupling phases. Next, so...

This work examines the quality factors (Q factors) of resonance associated with the axial and transverse vibrations of single-wall carbon nanotube (SWCNT) resonators through the use of molecular dynamics (MD) simulation. Specifically, the work investigates the effect of device length, diameter, and chirality, as well as temperature, on the resonant frequency and quality factor of these devices,...

R ecent advances in the formation of atomically thin layers of van der Waals (vdW)-bonded solids by mechanical exfoliation have opened up important new possibilities for the investigation of two-dimensional systems. Single-layer graphene, for example, exhibits many distinctive physical properties not found in its bulk counterpart, graphite. Further, the ability to form samples with a controlled...

we have calculated the phonon frequencies of kc1 along symmetry directions using an approach which is a combination of the frozen phonon and force constants methods. we also calculated griineisen parameters for all modes at x and l points in the brillouin zone. finally, the slope of acoustic dispersion curves around zone center were used to calculate the three independent elastic coefficients c...