14,091 research outputs found
Electric properties of granitic rocks
The objective of this work is to clarify the role of water content on the charge trans- port mechanisms of different granitic rocks. The mineralogical content of the rocks will also be taken into account. From the electrical point of view these materials are rather insulating porous media where charge injection creates different phenomena like build-up charges, space charge limited currents, surface effects and other behav- iors that resemble much a variety of oxides, like AlO
Magnetic and electric properties of quantum vacuum
In this report we show that vacuum is a nonlinear optical medium and we
discuss what are the optical phenomena that should exist in the framework of
the standard model of particle physics. We pay special attention to the low
energy limit. The predicted effects for photons of energy smaller than the
electron rest mass are of such a level that none has been observed
experimentally yet. Progresses in field sources and related techniques seem to
indicate that in few years vacuum nonlinear optics will be accessible to human
investigation.Comment: Reports on Progress in Physics (2013) in pres
Thermo-Electric Properties of Quantum Point Contacts
I. Introduction
II. Theoretical background (Landauer-Buttiker formalism of
thermo-electricity, Quantum point contacts as ideal electron waveguides,
Saddle-shaped potential)
III. Experiments (Thermopower, Thermal conductance, Peltier effect)
IV. ConclusionsComment: #4 of a series of 4 legacy reviews on QPC'
Research on the physics of solid materials semiannual status report no. 11, 1 may - 31 oct. 1964
Environmental effects on electric properties of n-p-n silicon transistor
Study of nickel-cadmium cells Second quarterly report, 17 Aug. - 17 Nov. 1965
Electric properties on nickel hydroxide electrode and sources and effects of impurities on nickel-cadmium cell performanc
Electric properties of the Beryllium-11 system in Halo EFT
We compute E1 transitions and electric radii in the Beryllium-11 nucleus
using an effective field theory that exploits the separation of scales in this
halo system. We fix the leading-order parameters of the EFT from measured data
on the 1/2+ and 1/2- levels in Be-11 and the B(E1) strength for the transition
between them. We then obtain predictions for the B(E1) strength for Coulomb
dissociation of the Be-11 nucleus to the continuum. We also compute the charge
radii of the 1/2+ and 1/2- states. Agreement with experiment within the
expected accuracy of a leading-order computation in this EFT is obtained. We
also discuss how next-to-leading-order (NLO) corrections involving both s-wave
and p-wave neutron-Be-10 interactions affect our results, and display the NLO
predictions for quantities which are free of additional short-distance
operators at this order. Information on neutron-Be-10 scattering in the
relevant channels is inferred.Comment: 27 pages, 8 figures, final versio
Magnetic radiation shielding systems analysis. superconducting coil technology
Shielding effectiveness and system mass of different magnetic field configurations - Electric properties and magnetic behavior of superconducting coils of niobium-zirconium allo
Magnetic and electric properties in the distorted tetrahedral spin chain system Cu3Mo2O9
We study the multiferroic properties in the distorted tetrahedral quasi-one
dimensional spin system CuMoO, in which the effects of the low
dimensionality and the magnetic frustration are expected to appear
simultaneously. We clarify that the antiferromagnetic order is formed together
with ferroelectric properties at K under zero magnetic field
and obtain the magnetic-field-temperature phase diagram by measuring dielectric
constant and spontaneous electric polarization. It is found that the
antiferromagnetic phase possesses a spontaneous electric polarization parallel
to the c axis when the magnetic field is applied parallel to the a axis. On
the other hand, there are three different ferroelectric phases in the
antiferromagnetic phase for parallel to the c axis.Comment: 4 pages, 3 figures, LT26 proceedings, accepted for publication in J.
Phys.: Conf. Se
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