Concept
Groupe d'espace
Publications associées (136)
Incommensurate phases
Incommensurately modulated crystalline phases are part of a more general family called aperiodic crystals. Their symmetry is treated within the theoretical framework of superspace groups that is a generalization of the 3D space groups that are used for con ...
Academic Press2024Magnetic structure of the two-dimensional XY antiferromagnet Sr2CoSi2O7 studied using single-crystal neutron diffraction
We report a combined polarized and unpolarized neutron diffraction study on a multiferroic Sr2CoSi2O7 (SCSO) single crystal below and above the antiferromagnetic ordering temperature TN = 6.5 K. Unpolarized neutron diffraction measurements at 15 K confirm ...
AMER PHYSICAL SOC2023Accelerated Workflow for Antiperovskite-based Solid State Electrolytes
Andrea Fedrigucci, Ivano Eligio Castelli
We developed and implemented a multi-target multi-fidelity workflow to explore the chemical space of antiperovskite materials with general formula X(3)BA (X=Li, Na, Mg) and Pm-3m space group, searching for stable high-performance solid state electrolytes f ...
WILEY-V C H VERLAG GMBH2023Disagreement and fragmentation in growing groups
The arise of disagreement is an emergent phenomenon that can be observed within a growing social group and, beyond a certain threshold, can lead to group fragmentation. To better understand how disagreement emerges, we introduce an analytically tractable m ...
PERGAMON-ELSEVIER SCIENCE LTD2023A type I conjecture and boundary representations of hyperbolic groups
We establish new results on the weak containment of quasi-regular and Koopman representations of a second countable locally compact group G associated with nonsingular G-spaces. We deduce that any two boundary representations of a hyperbolic locally ...
WILEY2023A new variable shape parameter strategy for RBF approximation using neural networks
The choice of the shape parameter highly effects the behaviour of radial basis function (RBF) approximations, as it needs to be selected to balance between the ill-conditioning of the interpolation matrix and high accuracy. In this paper, we demonstrate ho ...
PERGAMON-ELSEVIER SCIENCE LTD2023Bounds on scattering of neutral Goldstones
Andrea Guerrieri, Denis Karateev, Kelian Philippe Häring
We study the space of scattering amplitudes of neutral Goldstone bosons in four space-time dimensions. We establish universal bounds on the first two non-universal Wilson coefficients of the low energy Effective Field Theory (EFT) for such particl ...
2023