Concept
Polyamorphisme
Publications associées (248)
Phase transitions, screening and dielectric response of CsPbBr3
Cesium-lead-bromide (CsPbBr3) is the simplest all inorganic halide perovskite. It serves as a reference material for understanding the exceptional solar cell properties of the organic-inorganic hybrid halide perovskites and is itself discussed as an altern ...
ROYAL SOC CHEMISTRY2020Floating, critical, and dimerized phases in a frustrated spin-3/2 chain
Frédéric Mila, Natalia Chepiga
We study spontaneous dimerization and emergent criticality in a spin-3/2 chain with antiferromagnetic nearestneighbor J(1), next-nearest-neighbor J(2), and three-site J(3) interactions. In the absence of three-site interaction J(3), we provide evidence tha ...
AMER PHYSICAL SOC2020Heterogeneous catalyst preparation by liquid-phase atomic layer deposition
Heterogeneous catalyst preparation has been performed for close to a century but has been rapidly evolving spurred by the evolution in synthetic techniques and growing needs in energy, chemicals and materials. An increasing number of catalyst synthesis str ...
EPFL2020Spinon confinement and deconfinement in spin-1 chains
Frédéric Mila, Natalia Chepiga, Elisabeth Wybo
Motivated by the rich phase diagrams recently unveiled in frustrated spin-1 chains with competing next-nearest-neighbor and four-spin interactions, we investigate the nature of the elementary excitations of spin-1 chains in the vicinity of phase transition ...
AMER PHYSICAL SOC2020Triggered incommensurate transition in PbHfO3
We report a type of structural phase transitions in dielectric materials: the triggered incommensurate (IC) transition. We demonstrate evidence for such a transition in the perovskite antiferroelectric PbHfO3 by means of single-crystal x-ray diffraction, d ...
AMER PHYSICAL SOC2019Wearable Triboelectric Generator based on a Hybrid Mix of Carbon Nanotube and Polymer Layers
A novel single-layer structured triboelectric generator (TEG) is proposed with a hybrid mix of carbon nanotube (CNT) and silk. Here, the mixing of two materials in liquid phase for proven effective power generation is shown. In this research, CNT provides ...
IOP PUBLISHING LTD2019The Fluctuation Dissipation Theorem as a Diagnosis and Cure for Zero-Point Energy Leakage in Quantum Thermal Bath Simulations
Quantum thermal bath (QTB) simulations reproduce statistical nuclear quantum effects via a Langevin equation with a colored random force. Although this approach has proven efficient for a variety of chemical and condensed-matter problems, the QTB, as many ...
2019Mechanical spectroscopy as an in situ tool to study first and second order transitions in metastable Fe-Ga alloys
Phase transitions and related anelastic effects are examined in Fe-xGa alloys (x =19 and 27 at.%) by means of in situ neutron diffraction, vibrating sample magnetometry, dilatometry, and three different mechanical spectroscopy techniques: torsion forced pe ...
ELSEVIER SCIENCE SA2019Advanced Computational Methods for NMR Crystallography
Knowledge of the atomic-level structure is key to understanding and predicting properties of materials. X-ray diffraction (XRD) is the methods of choice for structures containing well-defined long-range order. However, many materials contain various degree ...
EPFL2019Hard Phase Crystallization Directs the Phase Segregation of Hydrogen-Bonded Supramolecular Polymers
A growing body of work shows that the phase behavior of supramolecular polymers assembled from telechelic building blocks featuring binding motifs at the two termini is quite similar to that of conventional block copolymers. However, it remains unclear how ...
AMER CHEMICAL SOC2019