Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/physrevb.36.2465 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Conspiracy theories, social polarization and crises].
Nervenarzt
November 2024
, Asternweg 65, 50259, Pulheim, Deutschland.
Objective: Social media facilitate the distribution of conspiracy theories. It is uncertain whether indeed the number of myths and also the number of those who appropriate myths has increased. Conspiracy theories have so far essentially been the subject of sociological and psychosociological research showing a general disposition to become infected irrespective of the topic of a myth.
View Article and Find Full Text PDFObservation of the nonanalytic behavior of optical phonons in monolayer hexagonal boron nitride.
Nat Commun
March 2024
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China.
Phonon splitting of the longitudinal and transverse optical modes (LO-TO splitting), a ubiquitous phenomenon in three-dimensional polar materials, will break down in two-dimensional (2D) polar systems. Theoretical predictions propose that the LO phonon in 2D polar monolayers becomes degenerate with the TO phonon, displaying a distinctive "V-shaped" nonanalytic behavior near the center of the Brillouin zone. However, the full experimental verification of these nonanalytic behaviors has been lacking.
View Article and Find Full Text PDFGiant and Nonanalytic Negative Piezoelectric Response in Elemental Group-Va Ferroelectric Monolayers.
Phys Rev Lett
December 2023
School of Physics, Zhejiang University, Hangzhou 310027, Zhejiang Province, China.
Materials with negative longitudinal piezoelectric response have been a focus of recent research. So far, reported examples are mostly three-dimensional bulk materials, either compounds with strong ionic bonds or layered materials with van der Waals interlayer gaps. Here, we report the first example in two-dimensional elemental materials-the class of group-Va monolayers.
View Article and Find Full Text PDFQuantum criticality in a uniaxial organic ferroelectric.
J Phys Condens Matter
October 2015
Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge, CB3 0HE, UK. CBPF, Rua Dr Xavier Sigaud 150, Urca, Rio de Janeiro, 22290-180, Brazil.
Tris-sarcosine calcium chloride (TSCC) is a highly uniaxial ferroelectric with a Curie temperature of approximately 130 K. By suppressing ferroelectricity with bromine substitution on the chlorine sites, pure single crystals were tuned through a ferroelectric quantum phase transition. The resulting quantum critical regime was investigated in detail and was found to persist up to temperatures of at least 30-40 K.
View Article and Find Full Text PDFDiscontinuity-free edge-diffraction model for characterization of focused wave fields.
J Opt Soc Am A Opt Image Sci Vis
March 2010
Institute of Automation and Electrometry, Russian Academy of Sciences, Prospekt Akademika Koptyuga 1, Novosibirsk 630090, Russia.
A model of discontinuity-free edge diffraction is proposed that is valid in the framework of the scalar Debye approximation and describes the formation process and approximate structure of the stationary diffracted field of a monochromatic converging spherical wave of limited angular opening throughout the whole space about the focus. The field is represented semianalytically in terms of the sum of a direct quasi-spherical wave and two edge quasi-conical waves of the zeroth and first order. The angular spectrum amplitudes of all these waves have smooth continuous variations of the real and imaginary parts in polar angle and radius, the separable nonanalytic functions defining the polar-angle variations of the amplitudes being found by optimization techniques.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!