نتایج جستجو برای: fermi
تعداد نتایج: 21809 فیلتر نتایج به سال:
We bosonize the low energy excitations of Fermi Liquids in any number of dimensions in the limit of long wavelengths. The bosons are coherent superposition of electron-hole pairs and are related with the displacements of the Fermi Surface in some arbitrary direction. A coherent-state path integral for the bosonized theory is derived and it is shown to represent histories of the shape of the Fer...
Calculation of Hall coefficient in semiclassical approach requires the first and the second derivatives of the energy bands at the Fermi level. We use the Maximally Localized Wannier Function technique to determine the required band derivatives and calculate the ordinary Hall conductivity and ordinary Hall coefficient in Al,Cu, Pd, Li, Au, Ag and Pb cubic metals.
A theoretical study of resonant tunneling in multilayered GaAlAs/GaAs structures are presented. The spectrum of resonant energies and its dependence on the barrier structure are analyzed from calculated profiles of barrier transparency versus energy, and from current voltage characteristics computed at selected temperatures and Fermi levels. The present formalism is based on the effective mas...
1 ENEA, Dipartimento Tecnologie Fisiche e Nuovi Materiali, Centro Ricerche Frascati, Via Enrico Fermi 45, 00044 Frascati, Rome, Italy 2ENEA fellow, Dipartimento Tecnologie Fisiche e Nuovi Materiali, Centro Ricerche Frascati, Via. Enrico Fermi 45, 00044 Frascati, Rome, Italy 3ENEA guest, Dipartimento Tecnologie Fisiche e Nuovi Materiali, Centro Ricerche Frascati, Via. Enrico Fermi 45, 00044 Fras...
Before considering the merits of the various proposed solutions to the Fermi paradox, this chapter presents some of the background. I first give a short biography of Enrico Fermi himself, focusing on just a few of his many and varied scientific accomplishments. I mention only those contributions to science that I refer to in later sections of the book. I ignore, for example, his contribution to...
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