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It is known that the hydrogenlike atom can be studied as a Morse oscillator, then here we show that these fact leads to an interesting method to obtain the matrix elements for the Coulomb potential. c © Electronic Journal of Theoretical Physics. All rights reserved.
We present the results of intrinsic transit time separation of SiGe:C heterojunction bipolar transistors (HBT). This is performed using a reliable technique based on hydrodynamic modeling. These results are compared to the extraction of the noise transport time. This last parameter is found to be equal to the sum of the base transit time… (More)
(Recibido 10 de Oct.2006; Aceptado 2 de Abr.2007; Publicado 23 de Abr. 2007) RESUMEN Mostramos la utilidad del teorema hipervirial en la obtención de los elementos de matriz <m l exp (q au ) l n > para el potencial de Morse. Además, es conocido que un átomo hidrogenoide puede ser estudiado como un oscilador de Morse, entonces aquí probamos que ese hecho… (More)
We shall use the quantities and notation stated in . The Petrov classification (PC) [1-8] of the Weyl tensor has a great importance in general relativity, thus it is attractive to account with an efficient procedure to determine the Petrov type of an arbitrary gravitational field. Peres  has worked out the tensorial version of the Petrov’s matrix… (More)
The high frequency and noise performances of n- and p-SiGe based MODFETs are reviewed. Their excellent HF and low noise behavior makes them well suited for RF mobile communications. We discuss their physical modeling, design optimization and self-heating effects.