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American Institute of Physics |
Documentos disponibles de esta editorial (326)
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Cremades Rodríguez, Ana Isabel ; Santos, M. T. ; Remon, A. ; Garcia, J. A. ; Dieguez, E. ; Piqueras de Noriega, Javier | American Institute of Physics | 1996-05-01Cathodoluminescence and photoluminescence of Bi_(12)Si_(O)20 and Bi_(12)GeO_(20) samples are studied. Both kinds of samples show a dark orange central part or core. Emissions in the blue, green, and red spectral regions are observed. The 640 nm [...]texto impreso
Cathodoluminescence and photoluminescence in the core region of Bi_12GeO_20 and Bi_12SiO_20 crystals
Cremades Rodríguez, Ana Isabel ; Santos, M. T. ; Remon, A. ; Garcia, J. A. ; Dieguez, E. ; Piqueras de Noriega, Javier | American Institute of Physics | 1996-05-01Cathodoluminescence and photoluminescence of Bi_12SiO_20 and Bi_12GeO_20 samples are studied. Both kinds of samples show a dark orange central part or core. Emissions in the blue, green, and red spectral regions are observed. The 640 nm band is [...]texto impreso
Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Volciuc, O. ; Popa, V. ; Tiginyanu, I. M. | American Institute of Physics | 2006-07-15Cathodoluminescence (CL) microscopy and spectroscopy have been used to investigate the optical properties of GaN microstructures patterned by Ar+ ion irradiation and subsequent photoelectrochemical (PEC) etching. Monochromatic CL images and CL s[...]texto impreso
Maestre Varea, David ; Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier | American Institute of Physics | 2004-03Cathodoluminescence (CL) in the scanning electron microscope (SEM) has been used to investigate the luminescence mechanisms in tin oxide. Sintered material prepared from high purity powder has been found to show a strong dependence of the CL emi[...]texto impreso
Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Golubev, VG. ; Kurdyukov, D.A. ; Pevtsov, A. B. | American Institute of Physics | 2001-10-01Synthetic opals infilled with silicon (opal-Si) and with Si and Pt (opal-Pt-Si) have been irradiated in a scanning electron microscope under high excitation conditions. Electron irradiation-induced changes in the morphology and luminescent defec[...]texto impreso
Wang, K. ; Martin, R. W. ; Nogales Díaz, Emilio ; Edwards, P. R. ; O’Donnell, K. P. ; Lorenz, K. ; Alves, E. ; Watson, I. M. | American Institute of Physics | 2006-09-25AlInN layers implanted with europium and erbium ions are systematically studied and compared with similarly implanted GaN. Cathodoluminescence from four series of annealed samples shows that the Eu/Er emissions from AlInN are considerably broade[...]texto impreso
Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier ; Solís, J. | American Institute of Physics | 1996-05-15Planarization of large grain diamond films has been induced by 193 nm excimer laser irradiation. Secondary emission images and cathodoluminescence (CL) in the scanning electron microscope have been used to characterize-the irradiated area. Irrad[...]texto impreso
Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier ; Xavier, C. ; Monteiro, T. ; Pereira, E. ; Meyer, B.K. ; Hofmann, D. M. ; Fischer, S. | American Institute of Physics | 1996-12-15GaN epitaxial layers have been investigated by cathodoluminescence (CL) in the scanning electron microscope (SEM). The most prominent feature of the spectra is a complex band at 2.2 eV, whose evolution with temperature and excitation density sug[...]texto impreso
Díaz-Guerra Viejo, Carlos ; Vincent, J. ; Piqueras de Noriega, Javier ; Bermudez, V. ; Dieguez, E. | American Institute of Physics | 2005-01-15The radiative recombination properties of Se-doped GaSb crystals grown by the Bridgman method have been investigated by cathodoluminescence (CL) microscopy and spectroscopy in the scanning electron microscope. A CL band centered at about 765 meV[...]texto impreso
A formalism is presented in order to impose causality conditions for finite?range interactions which do not require the existence of wave packets with a sharp front. The absence of bound states and particle production is assumed. Two different c[...]texto impreso
Domínguez-Adame Acosta, Francisco ; Piqueras de Noriega, Javier | American Institute of Physics | 1991-01-01Grain boundaries in GaP and InP have been studied by infrared cathodoluminescence (CL). In GaP the results indicate that there exists a depletion region beside grain boundaries where the concentration of P(Ga) antisite defects is lower than in t[...]texto impreso
Rezgui, B. Drid ; Gourbilleau, F. ; Maestre Varea, David ; Palais, O. ; Sibai, A. ; Lemiti, M. ; Bremond, G. | American Institute of Physics | 2012-07-15Experimental investigation of photoconductivity in Si-rich silicon oxide (SRSO)/SiO_2 multilayer (ML) structures prepared by magnetron reactive sputtering is reported. Photocurrent (PC) measurements show that the PC threshold increases with decr[...]texto impreso
We study the dependence of the ? ? scattering phase shifts on the light quark mass in both standard and unitarized SU(2) Chiral Perturbation Theory (ChPT) to one and two loops. We then use unitarized SU(3) ChPT to study the elastic f_0(600), k(8[...]texto impreso
Guzmán Navarro, G ; Herrera Zaldivar, M. ; Valenzuela Benavides, J. ; Maestre Varea, David | American Institute of Physics | 2011-07-01We report a cathodoluminescence (CL) study of ß-Ga_2O_3 nanowires grown by thermal evaporation of GaN on Si(100) and Au/Si(00) substrates. Condensation and subsequent oxidation of metallic Ga is suggested as the growth mechanism of ß-Ga_2O_3 nan[...]texto impreso
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Bourhrous, Hassan ; Cruz Dombriz, Álvaro de la ; Dunsby, Peter | American Institute of Physics | 2012We present a description of CMB anisotropies generated by tensor perturbations in f(R) theories of gravity. The temperature power spectrum in the special case of f(R) = Rn is computed using a modified version of CAMB package.texto impreso
Marín Palacios, María Pilar ; Aragón, A. M ; Garcia Escoria, A. ; Lieblich, M. ; Crespo del Arco, Patricia ; Hernando Grande, Antonio | American Institute of Physics | 2013-01-28Fe_(73.5)Si_(13.5)B_9Nb_3Cu_1 powder particles have been obtained by gas atomization. Magnetization curves and coercivity were studied for particles ranging in size up to 1000?. The overall magnetic behavior of such material is consequence of c[...]texto impreso
Rosado Vélez, Jaime ; Blanco Ramos, Francisco ; Arqueros Martínez, Fernando | American Institute of Physics | 2011Experimental results of the absolute air-fluorescence yield are given very often in different units (photons/MeV or photons/m) and for different wavelength intervals. In this work we present a comparison of available results normalized to its va[...]texto impreso
González Díaz, Germán ; Artús, L. ; Blanco, N. ; Cuscó, R. ; Ibañez, J. ; Long, A.R. ; Rahman, M. | American Institute of Physics | 2000-12-01We have verified the accuracy of free-charge determinations from Raman scattering in doped semiconductors by comparing the results obtained from phonon-plasmon coupled-mode line-shape fits with the charge-density values extracted from the analys[...]texto impreso
Bedeaux, D. ; Ortiz de Zárate Leira, José María ; Pagonabarraga, I. ; Sengers, J. V. ; Kjelstrup, S. | American Institute of Physics | 2011-09-28In this paper, we consider a simple reaction-diffusion system, namely, a binary fluid mixture with an association-dissociation reaction between two species. We study fluctuations at hydrodynamic spatiotemporal scales when this mixture is driven [...]texto impreso
Ortiz de Zárate Leira, José María ; Sengers, Jan V. ; Bedeaux, Dick ; Kjelstrup, Signe | American Institute of Physics | 2007-07-21In this paper a simple reaction-diffusion system, namely a binary fluid mixture with an association-dissociation reaction between the two components, is considered. Fluctuations at hydrodynamic spatiotemporal scales when a temperature gradient i[...]texto impreso
A new causal boundary, which we will term the l-boundary, inspired by the geometry of the space of light rays and invariant by conformal diffeomorphisms for space-times of any dimension m ? 3, proposed by one of the authors [R. J. Low, The Space[...]texto impreso
Navascués Cobo, Miguel ; Pérez García, David ; Junge, Marius ; Palazuelos Cabezón, Carlos ; Scholz, V. B. ; R. F. Werner, R. F. | American Institute of Physics | 2011We show that Tsirelson's problem concerning the set of quantum correlations and Connes' embedding problem on finite approximations in von Neumann algebras (known to be equivalent to Kirchberg's QWEP conjecture) are essentially equivalent. Specif[...]texto impreso
Gómez Nicola, Ángel ; Gilbert, D. A. ; González Herrera, Elvira María ; Liu, Kai ; Vicent López, José Luis | American Institute of Physics | 2013-02-04Hybrid superconducting/magnetic nanostructures on Si substrates have been built with identical physical dimensions but different magnetic configurations. By constructing arrays based on Co-dots with in-plane, out-of-plane, and vortex state magne[...]texto impreso
Hoyo Muñoz, Jesús del ; Martínez Vázquez, Rebeca ; Sotillo Buzarra, Belén ; Teddy Fernández, Toney ; Siegel, Jan ; Fernández Sánchez, Paloma ; Osellame, Roberto ; Solís Céspedes, Francisco Javier | American Institute of Physics | 2014Local compositional changes induced by high repetition rate fs-laser irradiation can be used to produce high performance optical waveguides in phosphate-based glasses. The waveguide refractive index contrast is determined by the local concentrat[...]