Zobrazeno 1 - 10
of 128
pro vyhledávání: '"K. H. Michel"'
Publikováno v:
Physical review B
Starting from our previous work in which we obtained a system of coupled integrodifferential equations for acoustic sound waves and phonon density fluctuations in two-dimensional (2D) crystals, we derive here the corresponding hydrodynamic equations,
Publikováno v:
physica status solidi (b). 253:2311-2315
Piezo- and flexoelectricity are manifestations of electromechanical coupling in solids with potential applications in nanoscale materials. Naumov et al. [Phys. Rev. Lett. 102, 217601 (2009)] have shown by first principles calculations that a monolaye
Publikováno v:
physica status solidi (b). 252:2433-2437
The thermal expansion in layered crystals is of fundamental and technological interest. As suggested by I. M. Lifshitz in 1952, in thin solid films (crystalline membranes) a negative contribution to is due to anharmonic couplings between in-plane str
Publikováno v:
Physical review B
Starting from a Hamiltonian with anharmonic coupling between in-plane acoustic displacements and outof-plane (flexural) modes, we derived coupled equations of motion for in-plane displacements correlations and flexural mode density fluctuations. Line
Publikováno v:
Physical review B
WOS: 000396013400005
The elastic constant C-11 and piezoelectric stress constant e(1),(11) of two-dimensional (2D) dielectric materials comprising h-BN, 2H-MoS2, and other transition-metal dichalcogenides and dioxides are calculated using lattic
The elastic constant C-11 and piezoelectric stress constant e(1),(11) of two-dimensional (2D) dielectric materials comprising h-BN, 2H-MoS2, and other transition-metal dichalcogenides and dioxides are calculated using lattic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfd30e426b8812656cf6d5cc06b2bcfe
http://arxiv.org/abs/1703.01162
http://arxiv.org/abs/1703.01162
Autor:
K. H. Michel, Bart Verberck
Publikováno v:
physica status solidi (b). 249:2604-2607
The determination of the layer number in nanoscale thin layered crystals is a challenging problem of technological relevance. In addition to innovative experimental techniques, a thorough knowledge of the underlying lattice dynamics is required. Star
Autor:
K. H. Michel, Bart Verberck
Publikováno v:
Physica status solidi: B: basic research
Taking into account covalent, Coulomb and van der Waals interactions, we construct the dynamical matrix and calculate the phonon dispersion relations for multilayer crystals of hexagonal boron-nitride. Coulomb interactions account for a strong overbe
Autor:
Bart Verberck, K. H. Michel
Publikováno v:
physica status solidi (b). 246:2802-2805
Starting from an empirical force constant model of valence interactions and calculating by Ewald's method the electrostatic force constants, we derive the dynamical matrix for a monolayer and for multilayer systems of hexagonal boron nitride (h-BN).
Publikováno v:
Physical review : B : condensed matter and materials physics
Anharmonic effects in an atomic monolayer thin crystal with honeycomb lattice structure are investigated by analytical and numerical lattice dynamical methods. Starting from a semiempirical model for anharmonic couplings of third and fourth orders, w
Publikováno v:
Fullerenes, nanotubes, and carbon nanostructures
We calculate the crystal field experienced by a single C60 molecule encapsulated in a single‐walled carbon nanotube. We take the icosahedral symmetry of the C60 molecule fully into account by treating it as a cluster of interaction centers. Althoug