Ab-initio modeling of Al2O3 lattice instability under extreme excitation of the electronic system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00578980" target="_blank" >RIV/68378271:_____/18:00578980 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/18:00507460

Výsledek na webu

<a href="https://doi.org/10.1016/j.nimb.2018.03.038" target="_blank" >https://doi.org/10.1016/j.nimb.2018.03.038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nimb.2018.03.038" target="_blank" >10.1016/j.nimb.2018.03.038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ab-initio modeling of Al2O3 lattice instability under extreme excitation of the electronic system

Popis výsledku v původním jazyce

Nonthermal phase transformations induced in Al2O3 by the electronic temperatures above ∼2.5 eV is demonstrated with ab initio molecular dynamics simulations. When this temperature exceeds ∼4 eV, such a transformation occurs within ∼500 fs i.e. within the typical time-scale of relaxation of the excited electronic system in a micron-size spot of a femtosecond-laser pulse. The electronic temperature at least above 6–10 eV is required for a nonthermal melting to occur in Al2O3 within ∼50–100 fs, which is the time scale of cooling down of the electronic system in a swift heavy ion track. Because such level of the electronic temperature cannot be kept during all this time, we conclude that nonthermal melting of alumina in SHI tracks is implausible.

Název v anglickém jazyce

Ab-initio modeling of Al2O3 lattice instability under extreme excitation of the electronic system

Popis výsledku anglicky

Nonthermal phase transformations induced in Al2O3 by the electronic temperatures above ∼2.5 eV is demonstrated with ab initio molecular dynamics simulations. When this temperature exceeds ∼4 eV, such a transformation occurs within ∼500 fs i.e. within the typical time-scale of relaxation of the excited electronic system in a micron-size spot of a femtosecond-laser pulse. The electronic temperature at least above 6–10 eV is required for a nonthermal melting to occur in Al2O3 within ∼50–100 fs, which is the time scale of cooling down of the electronic system in a swift heavy ion track. Because such level of the electronic temperature cannot be kept during all this time, we conclude that nonthermal melting of alumina in SHI tracks is implausible.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LG15013" target="_blank" >LG15013: Výzkum v rámci Mezinárodního centra hustého magnetizovaného plazmatu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Nuclear Instruments & Methods in Physics Research Section B

ISSN

0168-583X

e-ISSN

1872-9584

Svazek periodika

435

Číslo periodika v rámci svazku

Nov

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

87-92

Kód UT WoS článku

000452585500017

EID výsledku v databázi Scopus

2-s2.0-85045306644