BackExaminar OpenAire por departamento (eus.) "Fisika aplikatua I"
Now showing items 1-20 of 28
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A New Sol-Gel Route Towards Nd3+-doped SiO2-LaF3 Glass-Ceramics for Photonic Applications
; ; Balda de la Cruz, Rolindes
; ; ; (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+ ... -
Ab initio study of metastable occupation of tetrahedral sites in palladium hydrides and its impact on superconductivity
; Errea Lope, Ion (APS, 2023-01-11)
A recent experimental work on palladium hydrides suggested that metastable structures with hydrogen atoms occupying tetrahedral sites could lead to superconductivity above 50 K, a huge increase compared to the 9 K critical ... -
Ab initio study of the structural, vibrational, and optical properties of potential parent structures of nitrogen-doped lutetium hydride
Dangic, Dorde; ; ; ; Errea Lope, Ion (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 ... -
Absence of sizable superconductivity in hydrogen boride: A first-principles study
; Errea Lope, Ion (APS, 2022-12-12)
The recently synthesized hydrogen boride monolayer in the Cmmm phase is a promising superconductor due to its similarity to MgB2 and the large hydrogen content in its structure. Making use of first-principles calculations ... -
Accurate Determination of the Q Quality Factor in Magnetoelastic Resonant Platforms for Advanced Biological Detection
; ; Lasheras Aransay, Andoni; Muto Foresi, Virginia ; ; ; (MDPI, 2018-03)
The main parameters of magnetoelastic resonators in the detection of chemical (i.e., salts, gases, etc.) or biological (i.e., bacteria, phages, etc.) agents are the sensitivity S (or external agent change magnitude per Hz ... -
An intense narrow equatorial jet in Jupiter’s lower stratosphere observed by JWST
Hueso Alonso, Ricardo; Sánchez Lavega, Agustín María ; ; ; Antuñano Martín, Arrate ; ; ; ; ; ; Orton, Glenn S. ; ; ; ; ; ; ; ; ; ; (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 ... -
Anomalous High‐Temperature Superconductivity in YH6
Troyan, Ivan A.; Semenok, Dmitrii V.; Kvashnin, Alexander G.; Sadakov, Andrey V.; Sobolevskiy, Oleg A.; Pudalov, Vladimir M.; Ivanova, Anna G.; Prakapenka, Vitali B.; Greenberg, Eran; Gavriliuk, Alexander G.; Lyubutin, Igor S.; Struzhkin, Viktor V.; Bergara Jauregui, Aitor; Errea Lope, Ion; Bianco, Raffaello; Calandra, Matteo; Mauri, Francesco; Monacelli, Lorenzo; Akashi, Ryosuke; Oganov, Artem R. (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 ... -
Atomically-Precise Texturing of Hexagonal Boron Nitride Nanostripes
Ali, Khadiza; Fernández, Laura; Kherelden, Mohammad A.; Makarova, Anna A.; Píš, Igor; Bondino, Federica; Lawrence, James; G. de Oteyza, Dimas; Usachov, Dmitry Yu; Vyalikh, Denis V.; García de Abajo, F. Javier; Abd El-Fattah, Zakaria M.; Ortega Conejero, José Enrique; Schiller, Frederik (Wiley, 2021-09)
Monolayer hexagonal boron nitride (hBN) is attracting considerable attention because of its potential applications in areas such as nano- and opto-electronics, quantum optics and nanomagnetism. However, the implementation ... -
Band Structure and Energy Level Alignment of Chiral Graphene Nanoribbons on Silver Surfaces
Corso, Martina; Menchón, Rodrigo E.; Piquero Zulaica, Ignacio; Vilas Varela, Manuel; Ortega Conejero, José Enrique; Peña, Diego; De Oteyza, Dimas G. (MDPI, 2021-12-06)
Chiral graphene nanoribbons are extremely interesting structures due to their narrow band gaps and potential development of spin-polarized edge states. Here, we study their band structure on low work function silver surfaces. ... -
Black metal hydrogen above 360 GPa driven by proton quantum fluctuations
Monacelli, Lorenzo; Errea Lope, Ion; Calandra, Matteo; Mauri, Francesco (Nature Physics, 2020-09-07)
Hydrogen metallization under stable conditions is a major quest for realizing the first room temperature su- perconductor. Recent low-temperature experiments report different metallization pressures, varying from 360GPa ... -
Effect of the valence state on the band magnetocrystalline anisotropy in two-dimensional rare-earth/noble-metal compounds
Blanco Rey, María; ; ; ; ; ; Ortega Conejero, José Enrique ; ; (American Physical Society, 2022)
[EN] In intermetallic compounds with zero orbital momentum (L = 0) the magnetic anisotropy and the electronic band structure are interconnected. Here, we investigate this connection in divalent Eu and trivalent Gd intermetallic ... -
Excitonic insulator to superconductor phase transition in ultra-compressed helium
; Errea Lope, Ion; ; ; ; ; ; ; ; ; (Springer Nature, 2023-07-25)
Helium, the second most abundant element in the universe, exhibits an extremely large electronic band gap of about 20 eV at ambient pressures. While the metallization pressure of helium has been accurately determined, thus ... -
Impact of ionic quantum fluctuations on the thermodynamic stability and superconductivity of LaBH8
; Errea Lope, Ion (APS, 2022-10-19)
The recent prediction of a metastable high-symmetry Fm-3m phase of LaBH8 gives hopes to reach high superconducting critical temperatures at affordable pressures among ternary hydrogen-rich compounds. Making use of ... -
Influence of 4f filling on electronic and magnetic properties of rare earth-Au surface compounds
; Blanco Rey, María; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Ortega Conejero, José Enrique ; (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
; Balda de la Cruz, Rolindes; ; ; ; ; ; ; (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 ... -
Nanofocusing of acoustic graphene plasmon polaritons for enhancing mid-infrared molecular fingerprints
(De Gruyter, 2020)Mid-infrared (mid-IR) optical spectroscopy of molecules is of large interest in physics, chemistry, and biology. However, probing nanometric volumes of molecules is challenging because of the strong mismatch of their ... -
Non-Linear Optical Properties of Er3+–Yb3+-Doped NaGdF4 Nanostructured Glass–Ceramics
; ; Balda de la Cruz, Rolindes; ; ; ; (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 ... -
Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes
Arrue Aramburu, Juan Antonio; Jiménez Hernández, Felipe; Ayesta Ereño, Igor ; Illarramendi Leturia, María Asunción ; (MDPI, 2011-09)
Polymer optical fibers (POFs) doped with organic dyes can be used to make efficient lasers and amplifiers due to the high gains achievable in short distances. This paper analyzes the peculiarities of light amplification ... -
Quantum anharmonic enhancement of superconductivity in P63/mmc ScH6 at high pressures: A first-principles study
Hou, Pugeng; Belli, Francesco; Bianco, Raffaello; Errea Lope, Ion (AIP Publishing, 2021-11-05)
Making use of first-principles calculations, we analyze the effect of quantum ionic fluctuations and lattice anharmonicity on the crystal structure and superconductivity of P63/mmc ScH6 in the 100–160 GPa pressure range ... -
Quantum crystal structure in the 250-kelvin superconducting lanthanum hydride
Errea Lope, Ion; Belli, Francesco; Monacelli, Lorenzo; Sanna, Antonio; Koretsune, Takashi; Tadano, Terumasa; Bianco, Raffaello; Calandra, Matteo; Arita, Ryotaro; Mauri, Francesco; Flores-Livas, Jose A. (Springer Nature, 2020-02-05)
The discovery of superconductivity at 200 kelvin in the hydrogen sulfide system at high pressures demonstrated the potential of hydrogen-rich materials as high-temperature superconductors. Recent theoretical predictions ...