Vojko Matko (Avtor), Ewa Górecka (Avtor), Damian Pociecha (Avtor), Joanna Matraszek (Avtor), Nataša Vaupotič (Avtor)

Povzetek

The magnitude of the relative permittivity of the ferroelectric nematic phase (NF ) has been the subject of lively scientific discussion since the phase was recently discovered. Dielectric spectroscopy measurements (DSMs) give a huge value of relative permittivity, which depends on the cell thickness, but this is argued to result from a misinterpretation of the DSM results. We have conducted DSM using a set of cells differing in thickness of the NF layer, type of electrodes, and presence/absence of nanoscale-thick surface polymer layers. To model the DSM results, cells are presented by an equivalent electric circuit that includes a capacitor due to the NF layer with frequency dependent complex relative permittivity, capacitors due to surface layers, and a resistor describing the limited conductivity of electrodes. DSM results for different cells with the same liquid crystal in the NF phase are semiquantitatively reproduced by the same set of physical parameters if a huge relative permittivity of the NF , which is even orders of magnitude larger than the measured apparent values, is assumed. We show that the capacitance of surface layers should also be considered in cells with no polymer alignment layer on the electrodes.

Ključne besede

liquid crystals;statistical physics;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FNM - Fakulteta za naravoslovje in matematiko
Založnik: American Physical Society
UDK: 532.783
COBISS: 212927491 Povezava se bo odprla v novem oknu
ISSN: 2643-1564
Št. ogledov: 0
Št. prenosov: 6
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: Tekoči kristali;Statistična fizika;
Vrsta dela (COBISS): Znanstveno delo
Strani: 6 str.
Letnik: ǂVol. ǂ6
Zvezek: ǂiss. ǂ4, [article no.] L042017
Čas izdaje: 2024
DOI: 10.1103/PhysRevResearch.6.L042017
ID: 25420108