BackExaminar Artículos por departamento (eus.) "Materia kondentsatuaren fisika"
Now showing items 1-20 of 45
-
Acoustic plasmons in extrinsic free-standing graphene
; ; ; ; Pitarke de la Torre, José María
(IOP Publishing, 2014-08-04)
An acoustic plasmon is predicted to occur, in addition to the conventional two-dimensional (2D) plasmon, as the collective motion of a system of two types of electronic carriers coexisting in the same 2D band of extrinsic ... -
Atomistic Simulations of Geopolymer Models: The Impact of Disorder on Structure and Mechanics
; Manzano Moro, Hegoi; ; ; (ACS, 2018-06-13)
Geopolymers are hydrated aluminosilicates with excellent binding properties. Geopolymers appeal to the construction sector as a more sustainable alternative to traditional cements, but their exploitation is limited by a ... -
Combining strategies to make General Physics lectures more attractive and to improve students' performances
López, Gabriel Alejandro; Alonso Villanueva, Ibon ; Sáenz Aguirre, Jon ; ; ; González de Arrieta Martinez, Iñigo ; Echániz Ariceta, Telmo ; Unzueta Solozabal, Iraultza ; ; ; ; Martínez Perdiguero, Jesús ; García de Gurtubay Galligo, Idoia (IOP Publishing, 2019-08-21)
Going one step further in the use and impact measurement of new strategies to improve the teaching-learning process during lecturing General Physics courses, the current contribution reports the last results/observations ... -
Constraining the value of the dielectric constant of the ferroelectric nematic phase
; Martínez Perdiguero, Jesús (APS, 2024-08-27)
Ferroelectric nematic liquid crystals are currently being subject to a plethora of investigations since they are of great fundamental interest and could potentially foster promising applications. However, many basic aspects ... -
Development of a high-frequency dielectric spectrometer using a portable vector network analyzer
; Martínez Perdiguero, Jesús (AIP Publishing, 2024-02-05)
A simple and novel setup for high-frequency dielectric spectroscopy of materials has been developed using a portable vector network analyzer. The measurement principle is based on radio-frequency reflectometry, and both ... -
Dynamic screening and electron dynamics in low-dimensional metal systems
(Elsevier, 2007-01-03)Recent advances in the theoretical description of dynamic screening and electron dynamics in metallic media are reviewed. The time-dependent building-up of screening in different situations is addressed. Perturbative and ... -
Emergence of large nonadiabatic effects induced by the electron-phonon interaction on the complex vibrational quasiparticle spectrum of doped monolayer MoS2
; ; García de Gurtubay Galligo, Idoia; Eiguren Goyenechea, Asier (APS, 2020-02-20)
We present a comprehensive first-principles analysis of the nonadiabatic effects due to the electron-phonon interaction on the vibrational spectrum of the electron-doped monolayer MoS2. Deep changes in the Fermi surface ... -
Energy loss of charged particles moving parallel to a magnesium surface
García Vergniory, Maia; Silkin, Viatcheslav M.; García de Gurtubay Galligo, Idoia; Pitarke de la Torre, José María (American Physical Society, 2008-10)
We present it ab initio calculations of the electronic energy loss of charged particles moving outside a magnesium surface, from a realistic description of the one-electron band structure and a full treatment of the dynamical ... -
Exact-exchange Kohn-Sham potential, surface energy, and work function of jellium slabs
Horowitz, Claudio M.; Proetto, C. R.; Pitarke de la Torre, José María (American Physical Society, 2008-08)
Exact-exchange self-consistent calculations of the Kohn-Sham potential, surface energy, and work function of jellium slabs are reported in the framework of the optimized effective potential (OEP) scheme of density functional ... -
Exchange-Correlation Hole of a Generalized Gradient Approximation for Solids and Surfaces
Constantin, Lucian A.; Perdew, John P.; Pitarke de la Torre, José María (American Physical Society, 2009-02)
We propose a generalized gradient approximation (GGA) for the angle- and system-averaged exchange-correlation hole of a many-electron system. This hole, which satisfies known exact constraints, recovers the Perdew-Burke-Ernzerhof ... -
Experimental verification of the anomalous skin effect in copper using emissivity measurements
Echániz Ariceta, Telmo; ; ; (AIP, 2013-06-20)
Spectral directional emissivity has been measured in copper between 3 and 24 μm above room temperature. The experimental spectrum shows a weak broad peak between 7 and 14 μm, which is much more acute for higher emission ... -
Fermion-like behavior of elements/agents in their spatial distribution around points of interest
Martínez Perdiguero, Jesús (Elsevier, 2020-07-06)
In this paper we analyze the spatial distribution of elements around points of interest. Based on a spatial exclusion principle we model the system by means of a Fermi–Dirac distribution defined by two easily interpretable ... -
First spectral emissivity study of a solar selective coating in the150–600 ºC temperature range
; Echániz Ariceta, Telmo; ; ; ; ; ; ; ; ; (Elsevier, 2013-07-20)
A complete experimental study of temperature dependence of the total spectral emissivity has been performed, for the first time, for absorber–reflector selective coatings used in concentrated solar power (CSP) systems for ... -
First-principles calculations of hot-electron lifetimes in metals
Campillo Santos, Igor; Silkin, Viatcheslav M.; Pitarke de la Torre, José María; Tchoulkov Savkin, Evgueni Vladimirovich; Rubio Secades, Angel; Echenique Landiribar, Pedro Miguel (American Physical Society, 2000)
First-principles calculations' of the inelastic lifetime of low-energy electrons in Al, Mg, Be, and Cu are reported. Quasiparticle damping rates are evaluated from the: knowledge of the electron self-energy, which we compute ... -
Fragile Phases as Affine Monoids: Classification and Material Examples
Song, Zhi-Da; Elcoro Cengotitabengoa, Luis Angel; Xu, Yuan-Feng; Regnault, Nicolas; Bernevig, B. Andrei (American Physical Society, 2020-07-01)
Topological phases in electronic structures contain a new type of topology, called fragile, which can arise, for example, when an elementary band representation (atomic limit band) splits into a particular set of bands. ... -
Helmholtz Fermi surface harmonics: an efficient approach for treating anisotropic problems involving Fermi surface integrals
Eiguren Goyenechea, Asier; García de Gurtubay Galligo, Idoia (IOP Publishing, 2014-06-09)
We present a new efficient numerical approach for representing anisotropic physical quantities and/or matrix elements defined on the Fermi surface (FS) of metallic materials. The method introduces a set of numerically ... -
High temperature internal friction in a Ti–46Al–1Mo–0.2Si intermetallic, comparison with creep behaviour
Castillo Rodríguez, Miguel; Nó Sánchez, María Luisa; Jiménez, J. A.; Ruano, O. A.; San Juan Núñez, José María (Elsevier, 2016-01-15)
Advanced gamma-TiAl based intermetallics Mo-bearing have been developed to obtain the fine-grained microstructure required for superplastic deformation to be used during further processing. In the present work we have ... -
Importance of the spectral emissivity measurements at working temperature to determine the efficiency of a solar selective coating
Echániz Ariceta, Telmo; ; ; ; ; (Elsevier, 2015-09-01)
The total emissivity of the absorbing surfaces is a critical parameter in the calculation of the radiative thermal losses in solar thermal collectors. This is because the radiative heat losses have a significant economic ... -
Influence of Nb on Ti Diffusion in Gamma-TiAl Intermetallics Studied by Mechanical Spectroscopy
; ; ; ; San Juan Núñez, José María (Elsevier, 2021-01-25)
The development of intermetallic titanium aluminides has been driven by the aeronautic and aerospace industries because of the excellent mechanical properties and low density of gamma-TiAl based alloys. Up to now, several ... -
KIMERA: A Kinetic Montecarlo Code for Mineral Dissolution
Martín, Pablo; Gaitero Redondo, Juan José; Sánchez Dolado, Jorge; Manzano Moro, Hegoi (MDPI, 2020-09-18)
KIMERA is a scientific tool for the study of mineral dissolution. It implements a reversible Kinetic Monte Carlo (KMC) method to study the time evolution of a dissolving system, obtaining the dissolution rate and information ...