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Stable assemblies of topological defects in nematic orientational order [Elektronski vir]Hölbl, Arbresha ...We considered general mechanisms enabling the stabilization of localized assemblies of topological defects (TDs). There is growing evidence that physical fields represent fundamental natural ... entities, and therefore these features are of interest to all branches of physics. In general, cores of TDs are energetically costly, and consequently, assemblies of TDs are unfavorable. Owing to the richness of universalities in the physics of TDs, it is of interest to identify systems where they are easily experimentally accessible, enabling detailed and well-controlled analysis of their universal behavior, and cross-fertilizing knowledge in different areas of physics. In this respect, thermotropic nematic liquid crystals (NLCs) represent an ideal experiment testbed for such studies. In addition, TDs in NLCs could be exploited in several applications. We present examples that emphasize the importance of curvature imposed on the phase component of the relevant order parameter field. In NLCs, it is represented by the nematic tensor order parameter. Using a simple Landau-type approach, we show how the coupling between chirality and saddle splay elasticity, which can be expressed as a Gaussian curvature contribution, can stabilize Meron TDs. The latter have numerous analogs in other branches of physics. TDs in 2D curved manifolds reveal that the Gaussian curvature dominantly impacts the assembling and stabilization of TDs. Furthermore, a strong enough curvature that serves as an attractor for TDs is a respective field that could be imposed in a fast enough phase transition. Assemblies of created TDs created in such a disordered environment could be stabilized by appropriate impurities.Vir: ACS omega [Elektronski vir]. - ISSN 2470-1343 (Vol. 8, iss. 1, 2023, str. 169-179)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2023Jezik - angleškiCOBISS.SI-ID - 137430275
Avtor
Hölbl, Arbresha |
Mesarec, Luka |
Polanšek, Juš |
Iglič, Aleš, 1960- |
Kralj, Samo
Teme
Fizika |
Mehanika tekočin |
Tekoči kristali |
topološki defekti |
nematski tekoči kristali |
Gaussova ukrivljenost |
topološki naboj |
ne zaključna dela |
topological defects |
nematic liquid crystals |
Gaussian curvature |
topological charge
Avtor | Hölbl, Arbresha ... |
Naslov | Stable assemblies of topological defects in nematic orientational order [Elektronski vir] |
Datum objave | 2022-12-20 |
COBISS.SI-ID | 137430275 |
Verzija objave v repozitoriju | Založnikova različica |
Licenca objave v repozitoriju | Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna |
Embargo | Takojšnja javna objava |
Projekti, iz katerih je bila financirana objava
Naziv | Akronim | Številka projekta | Financer |
---|---|---|---|
Fizika mehkih snovi, površin in nanostruktur | P1-0099-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Fazni prehodi proti koordinaciji v večplastnih omrežjih | J1-2457-2020 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Vpliv mehanike in topologije membrane na celično ujetje bakterij, virionov in anorganskih delcev | J2-4447-2022 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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https://dk.um.si/IzpisGradiva.php?id=84744 |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Hölbl, Arbresha | 52404 |
Mesarec, Luka | 36461 |
Polanšek, Juš | |
Iglič, Aleš, 1960- | 04634 |
Kralj, Samo | 08612 |
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