Recent Submissions

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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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    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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    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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    Aplicación de un ciclo de mejora docente en Dinámica de la partícula  [Article]

    Martínez Ros, Alejandro Javier (Universidad de Sevilla, 2018)
    En esta comunicación se describe el diseño, aplicación y evaluación de un ciclo de mejora docente (CMD) realizado en la asignatura de Física I del Grado de Ingeniería Electrónica Industrial de la Universidad de Sevilla. ...
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    Solitary waves in the Ablowitz--Ladik equation with power-law nonlinearity  [Article]

    Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Malomed, Boris A.; Guo, Lijuan (IOP Publishing, 2019)
    We introduce a generalized version of the Ablowitz-Ladik model with a power-law nonlinearity, as a discretization of the continuum nonlinear Schr¨odinger equation with the same type of the nonlinearity. The model opens a ...
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    Continuous families of solitary waves in non-symmetric complex potentials: A Melnikov theory approach  [Article]

    Kominis, Yannis; Cuevas-Maraver, Jesús; Kevrekidis, Panayotis G.; Frantzeskakis, Dimitri J.; Bountis, Anastassios (Elsevier, 2019)
    The existence of stationary solitary waves in symmetric and non-symmetric complex potentials is studied by means of Melnikov’s perturbation method. The latter provides analytical conditions for the existence of such waves ...
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    Minimal formulation of the linear spatial analysis of capillary jets: Validity of the two-mode approach  [Article]

    González García, Heliodoro; Vázquez González, Pedro Ángel; García García, Francisco Javier; Guerrero Millán, Joséfa (American Physical Society, 2018)
    A rigorous and complete formulation of the linear evolution of harmonically stimulated capillary jets should include infinitely many spatial modes to account for arbitrary exit conditions [J. Guerrero et al., J. Fluid ...
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    Infinite charge mobility in muscovite at 300K  [Article]

    Russell, F. Michael; Archilla, Juan F. R.; Frutos Rayego, Fabián; Medina Carrasco, Santiago (IOP, 2017)
    Evidence is presented for infinite charge mobility in natural crystals of muscovite mica at room temperature. Muscovite has a basic layered structure containing a flat monatomic sheet of potassium sandwiched between ...

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