Thermal stability and topological charge fragmentation in antiskyrmions of rhombohedral barium titanate
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00638748" target="_blank" >RIV/68378271:_____/25:00638748 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0369398" target="_blank" >https://hdl.handle.net/11104/0369398</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.111.174106" target="_blank" >10.1103/PhysRevB.111.174106</a>
Alternative languages
Result language
angličtina
Original language name
Thermal stability and topological charge fragmentation in antiskyrmions of rhombohedral barium titanate
Original language description
Antiskyrmions, as topological quasiparticles, hold significant promise for spintronics and nanoscale data storage applications. Using molecular dynamics simulations based on effective Hamiltonians, we investigated the thermal stability of antiskyrmion nanodomains in rhombohedral barium titanate. At 1 K, antiskyrmions with a topological charge of -2 were found to be the most stable nanodomain state across all diameters examined by us. In our systematic study, the most robust antiskyrmion was found to have a diameter of 4 nm, maintaining its original size, shape, and topological charge up to the characteristic temperature T* ≈ 85 K. Domains with diameters between 2.8 and approximately 4.5 nm exhibited fragmentation into six topological defects, termed quarks, each carrying a fractional skyrmion charge of -1/3. For domains larger than 4.5 nm, each topological quark split into two prequarks, each with a charge of -1/6. These larger nanodomains demonstrated increased mobility and a growing tendency for shape and skyrmion charge fluctuations. Above the T* temperature, all larger nanodomains gradually shrank to a diameter of about 4 nm before collapsing into a single-domain state. These findings reveal the relatively high stability of antiskyrmions over a broad temperature range, even in the absence of a stabilizing bias field, and emphasize the pivotal role of topological quark dynamics. This establishes barium titanate as a key platform for exploring and applying topological phenomena.
Czech name
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Czech description
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Classification
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.)
Result continuities
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
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
111
Issue of the periodical within the volume
17
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
174106
UT code for WoS article
001494567700005
EID of the result in the Scopus database
2-s2.0-105005154098