Electrons interact strongly with their environment. The result of these interactions is, most the time, encoded in an effective mass. In non-relativistic systems, as condensed matter, electrons plus form a quasiparticle From side relativistic fermions also acquire mass due to surrounding medium. We employ non-perturbative method calculate and fermions, various situations. find masses up second ...

In this paper, drain-source current, transconductance and cutoff frequency in AlGaN/GaN high electron mobility transistors have been investigated. In order to obtain parameters of exact AlGaN/GaN high electron mobility transistors such as electron density, the wave function, band gap, polarization charge, effective mass and dielectric constant, the hydrostatic pressure and temperature effects a...

The combined effect of hydrostatic pressure and temperature on correlation energy in a triplet state of two electron spherical quantum dot with square well potential is computed. The result is presented taking GaAs dot as an example. Our result shows the correlation energies are i)negative in the triplet state contrast to the singlet state ii) it increases with increase in pressure  iii)further...