Now showing items 1-20 of 338

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      An excess electron at polyethylene/vacuum interfaces using a reaction-field technique  [Article]

      Wang, Yang; Wu, Kai; Cubero Gómez, David (Royal Society of Chemistry, 2019)
      We study the surface states of an excess electron at polyethylene/vacuum interfaces using an accurate reaction-field method, specifically designed to take into account the long range interaction of the excess electron and ...
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      On the effect of thin film growth mechanisms on the specular reflectance of aluminum thin films deposited via filtered cathodic vacuum arc  [Article]

      Rincón-Llorente, Gonzalo; Heras, Irene; Guillén Rodríguez, Elena; Schumann, Erik; Krause, Matthias; Escobar-Galindo, Ramón (MDPI, 2018)
      The optimisation of the specular reflectance of solar collectors is a key parameter to increase the global yield of concentrated solar power (CSP) plants. In this work, the influence of filtered cathodic vacuum arc deposition ...
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      Effect of the Incorporation of Titanium on the Optical Properties of ZnO Thin Films: From Doping to Mixed Oxide Formation  [Article]

      Yuste, Miriam; Escobar-Galindo, Ramón; Benito, Noelia; Palacio, Carlos; Martínez, Óscar; Albella, José María; Sánchez, Olga (MDPI, 2019)
      ZnO films with Ti atoms incorporated (TZO) in a wide range (0–18 at.%) have been grown by reactive co-sputtering on silicon and glass substrates. The influence of the titanium incorporation in the ZnO matrix on the structural ...
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      Parametrically driven nonlinear Dirac equation with arbitrary nonlinearity  [Article]

      Cooper, Fred; Khare, Avinash; Quintero, Niurka R.; Sánchez-Rey, Bernardo; Mertens, Franz G.; Saxena, Avadh (IOP Publishing, 2020-01)
      The damped and parametrically driven nonlinear Dirac equation with arbitrary nonlinearity parameter κ is analyzed, when the external force is periodic in space and given by f(x) = r cos(Kx), both numerically and in a ...
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      Exact stationary solutions of the parametrically driven and damped nonlinear Dirac equation  [Article]

      Quintero, Niurka R.; Sánchez-Rey, Bernardo (AIP Publishing, 2019)
      Two exact stationary soliton solutions are found in the parametrically driven and damped nonlinear Dirac equation. The parametric force considered is a complex ac force. The solutions appear when their frequencies are ...
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      Speed-of-light pulses in a massless nonlinear dirac equation  [Article]

      Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Mertens, Franz G.; Saxena, Avadh (American Physical Society, 2019)
      In this work, we explore a massless nonlinear Dirac equation, i.e., a nonlinear Weyl equation. We study the dynamics of its pulse solutions and find that a localized one-hump initial condition splits into a localized two ...
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      Evolution of Gaussian wave packets in capillary jets  [Article]

      García García, Francisco Javier; González García, Heliodoro; Gómez-Aguilar, Francisco José; Castrejón-Pita, Alfonso A.; Castrejón-Pita, José Rafael (American Physical Society, 2019)
      A temporal analysis of the evolution of Gaussian wave packets in cylindrical capillary jets is presented through both a linear two-mode formulation and a one-dimensional nonlinear numerical scheme. These analyses are ...
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      Antibacterial Nanostructured Ti Coatings by Magnetron Sputtering: From Laboratory Scales to Industrial Reactors  [Article]

      Álvarez Molina, Rafael; Muñoz-Piña, Sandra; González, María U.; Izquierdo-Barba, Isabel; Fernández-Martínez, Iván; Rico Gavira, Víctor Joaquín; Arcos, Daniel; García-Valenzuela, Aurelio; Palmero Acebedo, Alberto; Vallet-Regí, María; Rodríguez González-Elipe, Agustín; García-Martín, José María (MDPI, 2019)
      Based on an already tested laboratory procedure, a new magnetron sputtering methodology to simultaneously coat two-sides of large area implants (up to ~15 cm2) with Ti nanocolumns in industrial reactors has been developed. ...
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      Kinetic Energy-induced Growth Regimes of Nanocolumnar Ti Thin Films Deposited by Evaporation and Magnetron Sputtering  [Article]

      Álvarez Molina, Rafael; García Valenzuela, Aurelio; García Martín, José Miguel; Cotrino Bautista, José; Rodríguez González-Elipe, Agustín; Palmero Acebedo, Alberto (IOP Publishing, 2019)
      We experimentally analyze different growth regimes of Ti thin films associated to the existence of kinetic energy-induced relaxation mechanisms in the material's network when operating at oblique geometries. For this ...
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      Radiometric dating of recent sediments: On the performance of 210 Pb based CRS chronologies under varying rates of supply  [Article]

      Abril Hernández, José María (ELSEVIER, 2019)
      Radiometric dating was a revolutionary contribution to the study of sedimentary processes. Empirical data from varved sediments show that unsupported 210Pb (210 Pbexc) fluxes vary over time while they statistically ...
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      Growth of nanocolumnar thin films on patterned substrates at oblique angles  [Article]

      García-Valenzuela, Aurelio; Muñoz-Piña, Sandra; Alcalá, Germán; Álvarez Molina, Rafael; Lacroix, Bertrand; Santos, Antonio J; Cuevas-Maraver, Jesús; Rico Gavira, Víctor Joaquín; Gago, Raúl; Vázquez Burgos, Luis; Cotrino Bautista, José; Rodríguez González-Elipe, Agustín; Palmero Acebedo, Alberto (Wiley-VCH Verlag, 2019)
      The influence of one dimensional substrate patterns on the nanocolumnar growth of thin films deposited by magnetron sputtering at oblique angles is theoretically and experimentally studied. A well‐established growth model ...
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      Aprovechamiento energético de residuos industriales de alta carga orgánica mediante codigestión anaerobia  [Presentation]

      Benito Mora, Carlos; Alonso Contreras, Antonio José; Garvi Higueras, María Dolores; Morón Romero, María del Carmen; Lebrato Martínez, Julián (3ciencias. Editorial Área de Innovación y Desarrollo,S.L., 2018)
      El desarrollo de nueva y más estricta legislación en materia de tratamiento de residuos, hace necesaria la utilización y mejora de tecnologías no convencionales que eviten los problemas ambientales asociados a las técnicas ...
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      Soliton ratchet induced by random transitions among symmetric sine-Gordon potentials  [Article]

      Casado Pascual, Jesús; Sánchez-Rey, Bernardo; Quintero, Niurka R. (AIP Publishing, 2019)
      The generation of net solitonmotion induced by randomtransitions among N symmetric phase-shifted sine-Gordon potentials is investigated, in the absence of any external force and without any thermal noise. The phase shifts ...
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      Uso de microfluorescencia de rayos X y otras técnicas nucleares no destructivas para el estudio de joyas y metales arqueológicos  [Chapter of Book]

      Respaldiza Galisteo, Miguel Ángel; Scrivano, Simona; Ager Vázquez, Francisco José; Laclavetine, Kilian; Gómez Tubío, B.; Ortega Feliú, I. (La Ciencia y el arte VI Ciencias experimentales y conservación del patrimonio, 2017)
      Hoy en día, el estudio de objetos antiguos de metal incluye el análisis por medio de métodos físico-químicos no destructivos desarrollados en las décadas pasadas. Uno de los parámetros más importantes que deben conocerse ...
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      Impulse-induced localized nonlinear modes in an electrical lattice  [Article]

      Palmero Acebedo, Faustino; Cuevas-Maraver, Jesús; English, Lars Q.; Chacón, Ricardo (IOP Publishing, 2019)
      Intrinsic localized modes, also called discrete breathers (DBs), can exist under certain conditions in one-dimensional nonlinear electrical lattices driven by external periodic excitations (PEs). In this work, we have ...
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      Nonlinear waves in a chain of magnetically coupled pendula  [Article]

      García Raffi, Luis M.; Salmerón-Contreras, Luis J.; Jiménez, Noé; Ahmed, Mehem; Sánchez-Morcillo, Víctor J.; Picó, Rubén; Archilla, Juan F. R. (Acoustical Society of America, 2018)
      A motivation for the study of reduced models like one-dimensional systems in Solid State Physics is the complexity of the full problem. In recent years our group has studied theoretically, numerically and experimentally ...
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      Experimental and numerical observation of dark and bright breathers in the band gap of a diatomic electrical lattice  [Article]

      Palmero Acebedo, Faustino; English, Lars Q.; Chen, Xuan-Lin; Li, Weilun; Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G. (American Physical Society, 2019)
      We observe dark and bright intrinsic localized modes (ILMs), also known as discrete breathers, experimentally and numerically in a diatomic-like electrical lattice. The experimental generation of dark ILMs by driving ...
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      Nonlinear Beam Propagation in a Class of Complex Non-PT -Symmetric Potentials  [Chapter of Book]

      Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Frantzeskakis, Dimitri J.; Kominis, Yannis (Springer Nature Singapure, 2018)
      The subject of PT -symmetry and its areas of application have been blossoming over the past decade. Here, we consider a nonlinear Schrödinger model with a complex potential that can be tuned controllably away from being ...
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      Solitary waves in the Nonlinear Dirac Equation  [Chapter of Book]

      Cuevas-Maraver, Jesús; Boussaïd, Nabile; Comech, Andrew; Lan, Ruomeng; Kevrekidis, Panayotis G.; Saxena, Avadh (Springer Nature Switzerland AG, 2018)
      In the present work, we consider the existence, stability, and dynamics of solitary waves in the nonlinear Dirac equation. We start by introducing the Soler model of self-interacting spinors, and discuss its localized ...