Electronic nonequilibrium effect in ultrafast-laser-irradiated solids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F24%3A00617067" target="_blank" >RIV/61389021:_____/24:00617067 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00585129

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1402-4896/ad13df" target="_blank" >https://iopscience.iop.org/article/10.1088/1402-4896/ad13df</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1402-4896/ad13df" target="_blank" >10.1088/1402-4896/ad13df</a>

Result language

angličtina

Original language name

Electronic nonequilibrium effect in ultrafast-laser-irradiated solids

Original language description

This paper describes the effects of electronic nonequilibrium in a simulation of ultrafast laser irradiation of materials. The simulation scheme based on tight-binding molecular dynamics, in which the electronic populations are traced with a combined Monte Carlo and Boltzmann equation, enables the modeling of nonequilibrium, nonthermal, and nonadiabatic (electron-phonon coupling) effects simultaneously. The electron-electron thermalization is described within the relaxation-time approximation, which automatically restores various known limits such as instantaneous thermalization (the thermalization time τ e − e → 0 ) and Born-Oppenheimer (BO) approximation ( τ e − e → ∞ ). The results of the simulation suggest that the non-equilibrium state of the electronic system slows down electron-phonon coupling with respect to the electronic equilibrium case in all studied materials: metals, semiconductors, and insulators. In semiconductors and insulators, it also alters the damage threshold of ultrafast nonthermal phase transitions induced by modification of the interatomic potential due to electronic excitation. It is demonstrated that the models that exclude electron-electron thermalization (using the assumption of τ e − e → ∞ , such as BO or Ehrenfest approximations) may produce qualitatively different results, and a reliable model should include all three effects: electronic nonequilibrium, nonadiabatic electron-ion coupling, and nonthermal evolution of interatomic potential.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physica Scripta

ISSN

0031-8949

e-ISSN

1402-4896

Volume of the periodical

99

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

23

Pages from-to

015934

UT code for WoS article

001128694700001

EID of the result in the Scopus database

2-s2.0-85180528349