Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Archilla, Juan F. R."'
In this article, we explore the lifetime of localized excitations in nonlinear lattices, called breathers, when a thermalized lattice is perturbed with localized energy delivered to a single site. We develop a method to measure the time it takes for
Externí odkaz:
http://arxiv.org/abs/2411.06044
Publikováno v:
Physics Letters A 497 (2024) 129334, 1-7
We study numerically a discrete, nonlinear lattice, which is formed by a chain of pendula submitted to a harmonic-driving source with constant amplitude and parametrical excitation. A supratransmission phenomenon is obtained after the derivation of t
Externí odkaz:
http://arxiv.org/abs/2401.13141
Publikováno v:
J. Phys.: Conf. Ser. 2769 (2024) 012015 /1-19
It has been observed in fossil tracks and experiments in the layered silicate mica muscovite the transport of charge through the cation layers sandwiched between the layers of tetrahedra-octahedra-tetrahedra. A classical model for the propagation of
Externí odkaz:
http://arxiv.org/abs/2308.15186
Tokamak fusion reactors produce energetic He ions that penetrate surfaces less than 20 micron and neutrons that spread throughout the reactor. Experiments with similar swift He ions in heavy metals show that the vibronic coupling of nonlinear lattice
Externí odkaz:
http://arxiv.org/abs/2303.07087
Autor:
Bajārs, Jānis, Archilla, Juan F. R.
Publikováno v:
Physica D 441 (2022) 133497
We study nonlinear excitations propagating in a hexagonal layer which is a model for the cation layer of silicates. We consider their properties in the frequency-momentum or $\omega-k$ representation, extending the theory on pterobreathers in their m
Externí odkaz:
http://arxiv.org/abs/2201.03207
Publikováno v:
In: Skiadas C.H., Dimotikalis Y. (eds) 13th Chaotic Modeling and Simulation International Conference pp 721-734. CHAOS 2020. Springer Proceedings in Complexity. Springer, Cham
Since the latest review about solitary localized waves in muscovite, called quodons, [FM Russell, Springer Ser. Mater Sci. 221 (2015) 3] there have been many developments, specially from the point of view of experiments, published in several journals
Externí odkaz:
http://arxiv.org/abs/2011.07936
Publikováno v:
Chaos 28, 8, 083119 (2018)
Some layered silicates are composed of positive ions, surrounded by layers of ions with opposite sign. Mica muscovite is a particularly interesting material, because there exist fossil and experimental evidence for nonlinear excitations transporting
Externí odkaz:
http://arxiv.org/abs/1808.03414
Publikováno v:
Europhysics Letters 120 (2017) 46001
Evidence is presented for infinite charge mobility in natural crystals of muscovite mica at room temperature. Muscovite has a basic layered structure containing a flat monatomic sheet of potassium sandwiched between mirror silicate layers. It is an e
Externí odkaz:
http://arxiv.org/abs/1801.05196
Publikováno v:
J. Micromech. Mol. Phys. 01(2) 1650010 (2016)
At sufficiently low temperatures, the reaction rates in solids are controlled by quantum rather than by thermal fluctuations. We solve the Schr\"odinger equation for a Gaussian wave packet in a nonstation-ary harmonic oscillator and derive simple ana
Externí odkaz:
http://arxiv.org/abs/1606.01198