Phase behavior of a lattice-gas model for biaxial nematics

Oropesa, William Gabriel Carreras; Nascimento, Érika; Vieira, André P.

doi:10.1103/physreve.105.044705

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…3 and Ref. [94]), and in this case δT I-U < 0 because the presence of dipolar NPs decreases the effective interaction between nematogens. For κ > 0 the dipoles tend to align with the first axes of the nematogens, that is, the macroscopic director n corresponds to an easy axis for the dipoles.…”

Section: Lc-based Suspensionsmentioning

confidence: 87%

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Phase diagrams of microscopic models for nematogenic mixtures

Oropesa¹

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Even at such a delicate moment in human history, this investigation was uninterrupted. My sincere acknowledgment for Malén Ailín Narambuena, Yordana Oropesa Henriquez and André de Pinho Vieira. This is not my investigation, it is our investigation.• To Eduardo Nascimento for the long hours of talks about nematics liquid crystals. In my head you were always my cosupervisor.• To Carlos Eduardo Fiore and his research group for the collaborations (especially Carlos Fernandez and Angel Leiva), I always felt like one of you.• For the Cuban community of Rio Pequeno for the aid received at the birth of my daughter.• To my family for their unconditional support.

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Section: Lc-based Suspensionsmentioning

confidence: 87%

“…(4.30) and (4.31) indicate that the Landau point can only exist if ∆ = 1, and the φ-T diagrams present a line of Landau points Aβφ L = 1 (see Refs. [25] and [94]). For B = 0 we have many candidates for multicritical Landau points, satisfying…”

Section: The Landau Pointmentioning

confidence: 99%

Phase diagrams of microscopic models for nematogenic mixtures

Oropesa¹

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A high-temperature double perovskite molecule-based antiferroelectric with excellent anti-breakdown capacity for energy storage

Liu

et al. 2023

Nat Commun

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Halide double perovskites have recently emerged as an environmentally green candidate toward electronic and optoelectronic applications owing to their non-toxicity and versatile physical merits, whereas study on high-temperature antiferroelectric (AFE) with excellent anti-breakdown property remains a huge blank in this booming family. Herein, we present the first high-temperature AFE of the lead-free halide double perovskites, (CHMA)2CsAgBiBr7 (1, where CHMA+ is cyclohexylmethylammonium), by incorporating a flexible organic spacer cation. The typical double P-E hysteresis loops and J-E curves reveal its concrete high-temperature AFE behaviors, giving large polarizations of ~4.2 μC/cm2 and a high Curie temperature of 378 K. Such merits are on the highest level of molecular AFE materials. Particularly, the dynamic motional ordering of CHMA+ cation contributes to the formation of antipolar alignment and high electric breakdown field strength up to ~205 kV/cm with fatigue endurance over 104 cycles, almost outperforming the vast majority of molecule counterparts. This is the first demonstration of high-temperature AFE properties in the halide double perovskites, which will promote the exploration of new “green” candidates for anti-breakdown energy storage capacitor.

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