Il Nuovo Cimento D
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On soliton mechanism for diffusion of ionic defects in hydrogen-bonded solids
Il Nuovo Cimento D - Tập 12 - Trang 229-232 - 1990
It is shown that the solitonic mechanism may be responsible for the diffusion of ionic defects in some hydrogen-bonded solids. A good agreement with experiments is obtained for H3O+ in ice crystals.
Ultrarelativistic excitation of beat waves in a hot magnetized plasma
Il Nuovo Cimento D - Tập 13 - Trang 779-786 - 1991
A theoretical investigation is made on the nonlinear relativistic excitation of an electrostatic electron plasma wave at the beat frequency of two high-power colinear laser beams in a hot, homogeneous and magnetized plasma. The relativistic Vlasov equation expressed in gyrokinetic variables has been employed to find the nonlinear response of the magnetized plasma electrons. It is noted that the po......
Fabrication and test of a YBa2Cu3O7-δ three-pole band pass filter
Il Nuovo Cimento D - Tập 19 - Trang 1369-1373 - 1997
We designed and fabricated a Tchebysheff three-pole bandpass microstrip filter with a center frequency off= 9.5 GHz and bandwidth at —3 dB of 0.8%. The device has been made with high-quality YBa2Cu307-δ (YBCO) films deposited on LaA103 substrates by an inverted cylindrical magnetron sputtering technique. The microwave behavior of the YBCO films has been studied using a microstrip resonator techniq......
Light scattering studies of Brownian motion in confined geometries
Il Nuovo Cimento D - Tập 16 - Trang 1111-1118 - 1994
Dynamic light scattering can be a useful tool to determine the confinement of Brownian particles whose motion is restricted to dimensions comparable to the wavelength of the light. The theoretical form of the correlation function of the electric field scattered from such trapped particles has been derived and compared with the signal obtained both in a simulated experiment and in a real experiment......
The lattice dynamics of some type-I and type-II alloys
Il Nuovo Cimento D - - 1998
The lattice dynamical calculations are performed on some type-I and type-II alloys by using the third-neighbor Clark-Gazis-Wallis (CGW) model. The theory is used to compute the phonon dispersion curves, the frequency spectra and the lattice specific heat of the studied alloys. The obtained results are in good agreement with the experimental findings, and better than those obtained using other mode......
Ternary-compound thin-film solar cells
Il Nuovo Cimento D - Tập 2 - Trang 2013-2028 - 1983
History and current status of Cu-ternary-based photovoltaic devices are reviewed. Heterojunction and homojunction research on CuInS2, CuInSe2 and CuInTe2 is covered. Some emphasis is placed on the CdS, Cd(Zn)S/CuInSe2 thin-film solar cell, which has reached a 10% solar-conversion efficiency and has demonstrated remarkable stability characteristics. Fundamental properties of interface formation are......
Interfacial barrier contribution in Na2B4O7 glass system
Il Nuovo Cimento D - Tập 17 - Trang 499-502 - 1995
Frequency domain measurements on Na2B4O7 and Na2B4O7(95%)-V2O5(5%) glass systems have been carried out in the frequency range 10−2 to 104 Hz and temperature range 300 to 450 K. The complex capacitance has shown fractional power law dependences on frequency which obey the generalized Maxwell-Wagner relationships. The activation energy is found to increase with an increase in V2O5 composition.
Fine structure and isotope shift of the 3s4d 3 D-3s3p 3 P, 3s5d 3 D-3s3p 3 P and 3p 2 3 P-3s3p 3 P Transitions of MgI
Il Nuovo Cimento D - Tập 14 - Trang 955-959 - 1992
We report the measurements of the3
D(3s4d)-3
P(3s3p)3
D(3s5d)-3
P(3s3p), and3
P(3p
2)-3
P(3s3p) transition frequency of MgI, the fine-structure separation and isotope shift between24Mg and26Mg. The measurements have been performed i......
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