A through analysis is made of the dependence of the superconducting transition temperature ${T}_{c}$ on material properties ($\ensuremath{\lambda}$, ${\ensuremath{\mu}}^{*}$, phonon spectrum) as… Expand

First-principles quasiharmonic free-energy computations show that this mineral should dissociate into CsCl-type MgO cotunnite-type SiO2 at pressures and temperatures expected to occur in the cores of the gas giants + and in terrestrial exoplanets.Expand

Electron-phonon contributions to the infrared absorption in metals are examined from two points of view. First, "golden-rule" calculations are given for normal metals and superconductors which… Expand

Abstract Numerical studies of amorphous Si show that the lowest 4% of vibrational modes are piane wave like (‘propagons’) and the highest 3% of modes are localized (‘locons’). The rest are neither… Expand

A discussion of some of the difficulties with previous analyses of the resistivity of $A\ensuremath{-}15$ compounds is given. Precise high-temperature data on $\ensuremath{\alpha}$-particle- and… Expand

We calculate the conductance of a circular constriction of radius a in an insulating diaphragm which separates two conducting half spaces characterized by the mean free path l. Using the Boltzmann… Expand

The adiabatic approximation and perturbation theory to second order in atomic displacement are used to construct a theory of thermal-electron energy shifts. Both intraband and interband 'self-energy'… Expand