Nonthermal phase transitions in irradiated oxides

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00541080" target="_blank" >RIV/61389021:_____/20:00541080 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00533694

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-648X/aba389/meta" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-648X/aba389/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-648X/aba389" target="_blank" >10.1088/1361-648X/aba389</a>

Result language

angličtina

Original language name

Nonthermal phase transitions in irradiated oxides

Original language description

It is predicted theoretically that various oxides (Al2O3, MgO, SiO2 and TiO2) under ultrafast excitation of the electronic system exhibit nonthermal phase transitions. In the bulk, Al2O3 transiently forms a superionic phase via nonthermal phase transition, MgO and SiO2 disorder, TiO2 experiences solid-solid phase transition while thermal effects lead to melting. In the finite-size samples and near-surface regions, MgO undergoes solid-solid phase transition at lower doses than those required for atomic disorder. All studied oxides but TiO2, if allowed to expand, exhibit a lower damage threshold, whereas in TiO2 expansion releases the stress and prevents solid-solid phase transition thereby increasing the damage threshold up to the melting one. The results suggest that a nonthermal phase transition is a general response of oxides to sufficiently high ultrafast electronic excitation. A comparison with nonadiabatic simulations demonstrates that Born-Oppenheimer approximation systematically overestimates damage thresholds, and in some cases misses a phase transition entirely.

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

2020

Confidentiality

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

Name of the periodical

Journal of Physics-Condensed Matter

ISSN

0953-8984

e-ISSN

—

Volume of the periodical

32

Issue of the periodical within the volume

43

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

1-8

UT code for WoS article

000560665600001

EID of the result in the Scopus database

2-s2.0-85089844736