Heterogeneity and Memory Effect in the Sluggish Dynamics of Vacancy Defects in Colloidal Disordered Crystals and Their Implications to High‐Entropy Alloys
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202205522
Abstract: Vacancy dynamics of high‐density 2D colloidal crystals with a polydispersity in particle size are studied experimentally. Heterogeneity in vacancy dynamics is observed. Inert vacancies that hardly hop to other lattice sites and active vacancies that… read more here.
Keywords: vacancy; entropy alloys; memory effect; disordered crystals ... See more keywords
Dynamics of disordered mechanical systems with large connectivity, free probability theory, and quasi-Hermitian random matrices
Sign Up to like & getrecommendations! Published in 2021 at "Annals of Physics"
DOI: 10.1016/j.aop.2021.168456
Abstract: Abstract Disordered mechanical systems with high connectivity represent a limit opposite to the more familiar case of disordered crystals. Individual ions in a crystal are subjected essentially to nearest-neighbor interactions. In contrast, the systems studied… read more here.
Keywords: theory; disordered mechanical; disordered crystals; mechanical systems ... See more keywords
Lanthanide-doped disordered crystals: Site symmetry and optical properties
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DOI: 10.1016/j.jlumin.2018.04.057
Abstract: Abstract Lanthanide ions (Ln3+) doped disordered crystals, which exhibit excellent downshifting/upconversion luminescent properties, are widely used in a variety of optical and optoelectronic fields. The optical properties of Ln3+ ions are critically dependent on the… read more here.
Keywords: doped disordered; disordered crystals; optical properties; site symmetry ... See more keywords
Disordered Crystals Reveal Soft Quasilocalized Glassy Excitations.
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DOI: 10.1103/physrevlett.129.095501
Abstract: Structural glasses formed by quenching a melt are known to host a population of low-energy quasilocalized (nonphononic) excitations whose frequencies ω follow a universal ∼ω^{4} distribution as ω→0, independently of the glass formation history, the… read more here.
Keywords: crystals reveal; structural glasses; nonphononic excitations; excitations disordered ... See more keywords
Theory of Electron Correlation in Disordered Crystals
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DOI: 10.3390/ma15030739
Abstract: This paper presents a new method of describing the electronic spectrum and electrical conductivity of disordered crystals based on the Hamiltonian of electrons and phonons. Electronic states of a system are described by the tight-binding… read more here.
Keywords: theory electron; disordered crystals; electron correlation; correlation disordered ... See more keywords