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American Institute of Physics |
Documentos disponibles de esta editorial (326)
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In this work, we introduce a phenomenological model describing the thermoelectric power of icosahedral quasicrystals. On the basis of a realistic model for the spectral conductivity, obtained from ab initio band-structure calculations [C. Landau[...]texto impreso
Díez, E. ; Domínguez-Adame Acosta, Francisco ; Sánchez, Angel | American Institute of Physics | 1995-05-01We study resonant tunneling in B-S-doped diodes grown by Si-molecular beam epitaxy. A Thomas-Fermi approach is used to obtain the conduction-band modulation. Using a scalar Hamiltonian within the effective-mass approximation. we demonstrate that[...]texto impreso
Magdas, Dana A. ; Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier | American Institute of Physics | 2006-11-01Elongated In2O3 micro- and nanostructures have been grown by two-step thermal treatments of compacted InN powder, at temperatures between 350 and 700 degrees C. Different thermal treatments have been found to induce the growth of structures with[...]texto impreso
Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Castaldini, A. ; Cavallini, A. ; Polenta, L. | American Institute of Physics | 2003-08-15Time-resolved cathodoluminescence (TRCL) and photocurrent (PC) spectroscopies have been applied to the study of the yellow band of Si-doped GaN. Measurements carried out combining both techniques unambiguously reveal the complex nature of this b[...]texto impreso
Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Olea Ariza, Javier | American Institute of Physics | 2008-07-01Ion implantation of Ti into Si at high doses has been performed. After laser annealing the maximum average of substitutional Ti atoms is about 10(18) cm(-3). Hall effect measurements show n-type samples with mobility values of about 400 cm(2)/V [...]texto impreso
Total cross sections for electron scattering by 1-propanol at impact energies in the range 40-500 eV
Silva, D. G. M. da ; Gomes, M. ; Ghosh, S. ; Silva, I. F. L. ; Pires, W. A. D. ; Jones,, D. B. ; Blanco Ramos, Francisco ; García, C. ; Buckman, S. J. ; Brunger, M. J. ; Lopes, C. A. | American Institute of Physics | 2017-11-21Absolute total cross section (TCS) measurements for electron scattering from 1-propanol molecules are reported for impact energies from 40 to 500 eV. These measurements were obtained using a new apparatus developed at Juiz de Fora Federal Univer[...]texto impreso
Trace identities arising in the scattering theory of one-dimensional matrix Schrodinger operators are deduced. They derive from the properties of an asymptotic expansion of the trace of the resolvent kernel in inverse powers of the spectral para[...]texto impreso
Motivated by the classical studies on transformations of conjugate nets, we develop the general geometric theory of transformations of their discrete analogs: the multidimensional quadrilateral lattices, i.e., lattices x:Z(N)--> R-M, N less tha[...]texto impreso
Cascales, J. P. ; Martínez, I. ; Díaz, D. ; Rodrigo Martín-Romo, José Augusto ; Aliev, F. G. | American Institute of Physics | 2014-06-09The time dependent transient lateral photovoltaic effect has been studied with ls time resolution and with chopping frequencies in the kHz range, in lithographically patterned 21 nm thick, 5, 10, and 20 lm wide, and 1500 lm long Co lines grown o[...]texto impreso
Gómez, I. ; Díez, E. ; Domínguez-Adame Acosta, Francisco ; Orellana, P. A. | American Institute of Physics | 2002-10-15We present a model based on the two-dimensional transfer matrix formalism to calculate single-electron states in a random wide-gap semiconductor quantum dot superlattice. With a simple disorder model both the random arrangement of quantum dots ([...]texto impreso
González Herrera, Elvira María ; Núñez Álvarez, Nuria Ofelia ; Anguita, J. V. ; Vicent López, José Luis | American Institute of Physics | 2007-08-06Superconducting Nb films have been grown on top of arrays of Cu nanotriangles. These asymmetric pinning centers strongly modify the vortex lattice dynamics. Two rectification effects have been observed: (i) longitudinal ratchet effect when the i[...]texto impreso
We present numerically determined travelling-wave solutions for pressure-driven flow through a straight duct with a square cross-section. This family of solutions represents typical coherent structures (a staggered array of counter-rotating stre[...]texto impreso
Sefrioui, Zouhair ; Cros, V. ; Barthélémy, A. ; Peña, V. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Varela del Arco, María ; Pennycook, S.J. | American Institute of Physics | 2006-06-09We report large tunneling magnetoresistance in La_(0.7)Ca_(0.3)MnO_(3) (8 nm)/PrBa_(2)Cu_(3)O_(7) (2.4 nm)/La_(0.7)Ca_(0.3)MnO_(3) (50 nm) junctions. The coherent growth of the cuprate on the manganite allows the deposition of ultrathin barriers[...]texto impreso
Sekimoto, Atshushi ; Kawahara, Genta ; Sekiyama, K. ; Uhlmann, Markus ; Pinelli, Alfredo | American Institute of Physics | 2011Direct numerical simulations of fully developed turbulent flows in a horizontal square duct heated from below are performed at bulk Reynolds numbers Re(b) = 3000 and 4400 (based on duct width H) and bulk Richardson numbers 0texto impreso
Ivorra, Benjamin ; Redondo, Juana L. ; Santiago, Juan J. ; Ortigosa, Pilar M. ; Ramos del Olmo, Ángel Manuel | American Institute of Physics | 2013We present a design of a microfluidic mixer based on hydrodynamic focusing which is used to initiate the folding process (i.e., changes of the molecular structure) of a protein. The folding process is initiated by diluting (from 90% to 30%) the [...]texto impreso
Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Olea Ariza, Javier | American Institute of Physics | 2011-03-15Si samples have been implanted with very high Ti doses (over the theoretical Mott limit) to obtain an intermediate band (IB) in the host semiconductor. The electronic transport properties of this material have been analyzed by temperature-depend[...]texto impreso
Ramírez, J. G. ; Schmidt, Rainer ; Sharoni, A. ; Gómez, M. E. ; Schuller, Ivan K. ; Patiño, Edgar J. | American Institute of Physics | 2013-02-11Temperature dependent dielectric spectroscopy measurements on vanadium dioxide thin films allow us to distinguish between the resistive, capacitive, and inductive contributions to the impedance across the metal-insulator transition (MIT). We dev[...]texto impreso
Planetary systems are angular momentum reservoirs generated during star formation as a result of the joint action of gravity and angular momentum conservation. The accretion process drives to the generation of powerful engines able to drive the [...]texto impreso
Peláez Sagredo, José Ramón ; Hanhart, C. ; Nebreda Manjón, Jenifer ; Rios, G. | American Institute of Physics | 2010In this talk we briefly review how the unitarization of Chiral Perturbation Theory with dispersion relations can successfully describe the meson- meson scattering data and generate light resonances, whose mass, width and nature can be related to[...]texto impreso
León Yebra, Carlos ; Martín, J. M. ; Santamaría Sánchez-Barriga, Jacobo ; Skarp, J. ; González Díaz, Germán ; Sánchez Quesada, Francisco | American Institute of Physics | 1996-05-15The use of Kramers–Kronig transforms is proposed for the treatment of admittance spectroscopy data of junctions when significant shunt conductance or series resistance is present. An algorithm has been implemented to calculate the transformation[...]texto impreso
Rodríguez Caderot, Gracia ; Folgueira, Marta ; Mejuto, J. ; Cerdeño, M.L. ; Rodríguez, C. | American Institute of Physics | 2010In this work, we present an example of multidisciplinary research in Archaeoastronomy. We have analyzed in detail a well known and excavated hillfort and an Iron Age cemetery placed in the celtiberian area of the Iberian Peninsula. Adding to thi[...]texto impreso
López de Haro, Mariano ; Fernández Tejero, Carlos ; Santos, Andrés ; Yuste, Santos B. ; Fiumara, Giacomo ; Saija, Franz | American Institute of Physics | 2015-01-07The problem of demixing in the Asakura-Oosawa colloid-polymer model is considered. The critical constants are computed using truncated virial expansions up to fifth order. While the exact analytical results for the second and third virial coeffi[...]texto impreso
Borini, S. ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier | American Institute of Physics | 2003-12-15The luminescence of mechanically milled GaSb has been investigated by means of cathodoluminescence (CL) in the scanning electron microscope. Transmission electron microscopy reveals that the GaSb powders obtained after the milling process contai[...]texto impreso
Marcano, N. ; Sangiao, S. ; Plaza, M. ; Pérez García, Lucas ; Fernández Pacheco, A. ; Córdoba, R. ; Sánchez, M. C. ; Morellon, L. ; Ibarra, M. R. ; De Teresa, J. M. | American Institute of Physics | 2010-02-22We study the electrical resistivity of individual Bi nanowires of diameter 100 nm fabricated by electrodeposition using a four-probe method in the temperature range 5-300 K with magnetic fields up to 90 kOe. Low-resistance Ohmic contacts to indi[...]texto impreso
Werner, Klaus ; Shustov, Boris ; Sachkov, Mikhail ; Gómez de Castro, Ana Inés ; Huang, Maohai ; Kappelmann, Norbert ; Zhao, Gang | American Institute of Physics | 2009The World Space Observatory Ultraviolet (WSO-UV) is an international space mission devoted to UV spectroscopy and imaging. The observatory includes a 1.7 m aperture telescope capable of high-resolution and long-slit low-resolution spectroscopy, [...]texto impreso
Serrano, A. ; Gálvez Alonso, Fernando ; Rodríguez de la Fuente, Óscar ; García, M. A. | American Institute of Physics | 2013-03-21We present here a study of hard X-ray irradiation of soda-lime glasses performed in situ and in real time. For this purpose, we have used a Au thin film grown on glass and studied the excitation of its surface plasmon resonance (SPR) while irrad[...]