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Upconversion cooling of Er-doped low-phonon fluorescent solids
(American Physical Society, 2009-01)
We report on a novel mechanism for laser cooling of fluorescent solids based on infrared-to-visible upconversion often found in rare-earth-doped low-phonon materials. This type of optical cooling presents some advantages ...
Anomalous High‐Temperature Superconductivity in YH6
(Wiley-VCH GmbH, 2021-03-10)
Pressure‐stabilized hydrides are a new rapidly growing class of high‐temperature superconductors, which is believed to be described within the conventional phonon‐mediated mechanism of coupling. Here, the synthesis of one ...
Strong anharmonic and quantum effects in Pm-3n AlH3 under high pressure: A first-principles study
(APS, 2021-04-29)
Motivated by the absence of experimental superconductivity in the metallic Pm-3n phase of
AlH3 despite the predictions, we reanalyze its vibrational and superconducting properties at pressures
P≥99 GPa making use of ...
Designing periodic and aperiodic structures for nanophotinic devices.
(2019-05-22)
Future all--optical networks will require to substitute the present electronic integrated circuitry by optical analogous devices that satisfy the compactness, throughput, latency and high transmission efficiency requirements ...
Exploring the Different Degrees of Magnetic Disorder in TbxR1−xCu2 Nanoparticle Alloys
(MDPI, 2020-10-28)
Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1−xCu2 (R ≡ Gd, La, Y) alloys have been produced ...
Characterization of hydrogen based superconductors from first principles
(2022-12-16)
En esta tesis, primero se realiza una investigación de las propiedades químicas, estructurales y electrónicas de un gran conjunto de superconductores binarios basados en hidrógeno, a través de métodos ab initio basados en ...
Design and development of a thermochemical energy storage system based on the redox couple Mn2O3/Mn3O4 for concentrated solar power plants
(2022-03-01)
The future energy grid based on renewable energy sources will require strong support from energy storage systems since renewable energy cannot be managed. Concentrated solar power is one of the leading technologies to ...
Dificultades de aprendizaje del modelo de sonido: una revisión de la literatura
(Universitat Autónoma de Barcelona, 2021-06)
Learning the scientific model of sound (ScMS) is present in the science curriculum of all educational levels and is a critical component of scientific literacy. This paper presents a systematic review of students' understanding ...
Downscaling of surface moisture flux and precipitation in the Ebro Valley (Spain) using analogues and analogues followed by random forests and multiple linear regression
(Copernicus Gesellschaft, 2011)
In this paper, reanalysis fields from the ECMWF have been statistically downscaled to predict from large-scale atmospheric fields, surface moisture flux and daily precipitation at two observatories (Zaragoza and Tortosa, ...
Characterizing Subsurface Rectangular Tilted Heat Sources Using Inductive Thermography
(MDPI, 2020-08-06)
In this study, we characterize the lateral dimension, depth, and inclination of buried tilted rectangular heat sources from time domain temperature data measured at the surface. The heat sources are representative for ...