Subterahertz collective dynamics of polar vortices

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00542867" target="_blank" >RIV/68378271:_____/21:00542867 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41586-021-03342-4" target="_blank" >https://doi.org/10.1038/s41586-021-03342-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41586-021-03342-4" target="_blank" >10.1038/s41586-021-03342-4</a>

Result language
angličtina
Original language name
Subterahertz collective dynamics of polar vortices
Original language description
Using terahertz-field excitation and femtosecond X-ray diffraction measurements, we observe ultrafast collective polarization dynamics that are unique to polar vortices earlier shown to have topology of 2D skyrmions. A previously unseen tunable mode, hereafter referred to as a vortexon, emerges in the form of transient arrays of nanoscale circular patterns of atomic displacements. Its frequency is considerably reduced (softened) at a critical strain, indicating a condensation (freezing) of structural dynamics. We use first-principles-based atomistic calculations and phase-field modelling to reveal the microscopic atomic arrangements and corroborate the frequencies of the vortex modes.n
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/GX19-28594X" target="_blank" >GX19-28594X: Ferroelectric skyrmions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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