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Ab initio study of the structural, vibrational, and optical properties of potential parent structures of nitrogen-doped lutetium hydride
(APS, 2023-08-28)
The recent report of near-ambient conditions superconductivity in a nitrogen-doped lutetium hydride has inspired a large number of experimental studies with contradictory results. We model from first principles the physical ...
Influence of 4f filling on electronic and magnetic properties of rare earth-Au surface compounds
(Royal Society of Chemistry, 2020-11-21)
One-atom-thick rare-earth/noble metal (RE-NM) compounds are attractive materials to investigate two-dimensional magnetism, since they are easy to synthesize into a common RE-NM2 structure with high crystal perfection. Here ...
KLaF4:Nd3+ doped transparent glass-ceramics processed by spark plasma sintering
(Elsevier, 2022-02-15)
[EN] Transparent oxyfluoride glass-ceramics (GCs) containing KLaF4 nanocrystals (NCs) doped with Nd3+ were prepared by Spark Plasma Sintering (SPS). Glass powder pellets were sintered under a vacuum atmosphere, optimizing ...
Non-Linear Optical Properties of Er3+–Yb3+-Doped NaGdF4 Nanostructured Glass–Ceramics
(MDPI, 2020-07-21)
Transparent oxyfluoride glass–ceramics containing NaGdF4 nanocrystals were prepared by melt-quenching and doped with Er3+ (0.5 mol%) and different amounts of Yb3+ (0–2 mol%). The selected dopant concentration the crystallization ...
A New Sol-Gel Route Towards Nd3+-doped SiO2-LaF3 Glass-Ceramics for Photonic Applications
(Royal Society Of Chemistry, 2020-12-01)
Glass-ceramic materials with composition 0.9Nd(3+)-80SiO(2)-20LaF(3) were successfully obtained and further heat-treated at 450 degrees C for 6 h. Stable and homogeneous LaF3 nanoparticle suspensions with and without Nd3+ ...
Quantum structural fluxion in superconducting lanthanum polyhydride
(Nature Communications, 2023-03-25)
The discovery of 250-kelvin superconducting lanthanum polyhydride under high pressure marked a significant advance toward the realization of a room‐temperature superconductor. X-ray diffraction (XRD) studies reveal a ...
Thermal Diffusivity Measurement of Laser‐ Deposited AISI H13 Tool Steel and Impact on Cooling Performance of Hot Stamping Tools
(MDPI, 2020-01-20)
Additive manufacturing is a technology that enables the repair and coating of high‐addedvalue
parts. In applications such as hot stamping, the thermal behavior of the material is essential
to ensure the proper operation ...
An intense narrow equatorial jet in Jupiter’s lower stratosphere observed by JWST
(Springer Nature, 2023-10-19)
The atmosphere of Jupiter has east–west zonal jets that alternate as a function of latitude as tracked by cloud motions at tropospheric levels. Above and below the cold tropopause at ~100 mbar, the equatorial atmosphere ...
Large impact of phonon lineshapes on the superconductivity of solid hydrogen
(Springer Nature, 2024-05-09)
Phonon anharmonicity plays a crucial role in determining the stability and vibrational properties of high-pressure hydrides. Furthermore, strong anharmonicity can render phonon quasiparticle picture obsolete questioning ...
Assessing the feasibility of near-ambient conditions superconductivity in the Lu-N- H system
(Springer Nature, 2024-04-24)
The report of near-ambient superconductivity in nitrogen-doped lutetium hydrides (Lu-N-H) has generated a great interest. However, conflicting results raised doubts regarding superconductivity. Here, we combine high-throughput ...