Now showing items 1-20 of 39

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      Acoustic plasmons in extrinsic free-standing graphene 

      Pisarra, M.; Sindona, A.; Riccardi, P.; Silkin, Viatcheslav M.; Pitarke de la Torre, José María ORCID (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 ...
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      Atomistic Simulations of Geopolymer Models: The Impact of Disorder on Structure and Mechanics 

      Lolli, Francesca; Manzano Moro, Hegoi ORCID; Provis, John L.; Bignozzi, Maria Chiara; Masoero, Enrico (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 ...
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      Development of a high-frequency dielectric spectrometer using a portable vector network analyzer 

      Ercoreca González, Aitor; Martínez Perdiguero, Jesús ORCID (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 ...
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      Energy loss of charged particles moving parallel to a magnesium surface 

      García Vergniory, Maia; Silkin, Viatcheslav M.; García de Gurtubay Galligo, Idoia ORCID; Pitarke de la Torre, José María ORCID (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 ...
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      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 ORCID (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 ...
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      Exchange-Correlation Hole of a Generalized Gradient Approximation for Solids and Surfaces 

      Constantin, Lucian A.; Perdew, John P.; Pitarke de la Torre, José María ORCID (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 ...
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      Experimental verification of the anomalous skin effect in copper using emissivity measurements 

      Echániz Ariceta, Telmo ORCID; Setién Fernández, Iñigo; Pérez Sáez, Raúl Benjamín; Tello León, Manuel (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 ...
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      Fermion-like behavior of elements/agents in their spatial distribution around points of interest 

      Martínez Perdiguero, Jesús ORCID (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 ...
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      First spectral emissivity study of a solar selective coating in the150–600 ºC temperature range 

      Setién Fernández, Iñigo; Echániz Ariceta, Telmo ORCID; Fernández González, Luis; Pérez Sáez, Raúl Benjamín; Céspedes, Eva; Sánchez-García, José Ángel; Álvarez-Fraga, Leopoldo; Escobar Galindo, Ramón; Albella, José María; Prieto, Carlos; Tello León, Manuel (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 ...
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      First-principles calculations of hot-electron lifetimes in metals 

      Campillo Santos, Igor; Silkin, Viatcheslav M.; Pitarke de la Torre, José María ORCID; 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 ...
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      Fragile Phases as Affine Monoids: Classification and Material Examples 

      Song, Zhi-Da; Elcoro Cengotitabengoa, Luis Angel ORCID; 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. ...
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      Helmholtz Fermi surface harmonics: an efficient approach for treating anisotropic problems involving Fermi surface integrals 

      Eiguren Goyenechea, Asier ORCID; García de Gurtubay Galligo, Idoia ORCID (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 ...
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      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 ORCID (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 ...
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      Importance of the spectral emissivity measurements at working temperature to determine the efficiency of a solar selective coating 

      Echániz Ariceta, Telmo ORCID; Setién Fernández, Iñigo; Pérez Sáez, Raúl Benjamín; Prieto, Carlos; Escobar Galindo, Ramón; Tello León, Manuel (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 ...
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      Influence of Nb on Ti Diffusion in Gamma-TiAl Intermetallics Studied by Mechanical Spectroscopy 

      Ibáñez Pérez, Josu; Nó Sánchez, María Luisa; Oehring, M.; Clemens, Helmut; San Juan Núñez, José María ORCID (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 ...
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      KIMERA: A Kinetic Montecarlo Code for Mineral Dissolution 

      Martín, Pablo; Gaitero Redondo, Juan José; Sánchez Dolado, Jorge; Manzano Moro, Hegoi ORCID (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 ...
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      Large magnetoelectric coupling in multiferroic oxide heterostructures assembled via epitaxial lift-off 

      Pesquera, D.; Khestanova, E.; Ghidini, M.; Zhang, S.; Rooney, A. P.; Maccherozzi, F.; Riego Saavedra, Patricia; Farokhipoor, S.; Kim, J.; Moya, X.; Vickers, M. E.; Stelmashenko, N. A.; Haigh, S. J.; Dhesi, S. S.; Mathur, N. D. (Nature, 2020-06-24)
      Epitaxial films may be released from growth substrates and transferred to structurally and chemically incompatible substrates, but epitaxial films of transition metal perovskite oxides have not been transferred to electroactive ...
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      Long-living carriers in a strong electron-phonon interacting two-dimensional doped semiconductor 

      García Goincelaya, Peio; Lafuente Bartolomé, Jon; García de Gurtubay Galligo, Idoia ORCID; Eiguren Goyenechea, Asier ORCID (Nature Publishing Group, 2019-07-15)
      Carrier doping by the electric field effect has emerged as an ideal route for monitoring many-body physics in two-dimensional materials where the Fermi level is tuned so that the strength of the interactions can also be ...
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      Ni–Ti-Hf High-Temperature Shape Memory Alloy: Measure of the Clausius-Clapeyron Coefficient Through Mechanical Spectroscopy 

      Pérez Cerrato, Mikel ORCID; Maass, B.; Nó Sánchez, María Luisa; San Juan Núñez, José María ORCID (Elsevier, 2021-03-05)
      The martensitic transformation of Ni49.5Ti35.5Hf15 high temperature shape memory alloy is characterized by internal friction measurements. The temperatures for the reversible B2 <-> B19' transformation appear in the range ...
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      On a Common Mistake in the Description of the Photoelectric Effect 

      Martinez Perdiguero, Jesús (AIP, 2019-11-01)
      The photoelectric effect is one of the key experiments taught during first- or second-year university and high school modern physics courses. It is usually the first experiment to introduce light quantization and the concept ...