Streaming effects on dust ion acoustic wave in dense quantized plasmas

The propagation of dust-ion acoustic (DIA) wave is studied with the streaming effects of ion particles in a quantum dusty plasmas. The quantum effects arising from Landau magnetization, Fermi degenerate pressure, tunneling potential and exchange-correlation potential are considered for the electrons. Linear dispersion relation is derived using Quantum Hydrodynamic Model and the results are graphically presented showing the propagation and growth rate of the electrostatic mode in the dense plasma environment.

CALCULATION OF EXCHANGE INTEGRALS OF VOLUME MAGNETIC CRYSTAL STRUCTURES Fe, Co, Ni AND CrNb3S6

The results of calculations of magnetic moments and exchange integrals of bulk magneto-crystalline structures Fe, Co, Ni, and CrNb3S6 using the SPR-KKR package are presented. The influence of various crystal structures and approximations of the exchange-correlation potential is investigated.

Landau Quantised Modification of Rayleigh–Taylor Instability in Dense Plasmas

Effects of Landau quantisation and exchange-correlation potential on Rayleigh–Taylor instability (RTI)/gravitational instability are investigated in inhomogeneous dense plasmas. Quantum hydrodynamic model is used for the electrons, while the ions are assumed to be cold and classical. RTI is modified with the inclusion of Landau quantisation related to plasma density, ambient magnetic field, exchange speed, and modified Fermi speed. Owing to the exchange-correlation effects, gravitational instability increases, whereas the Landau quantisation effects contribute in the opposite way for quantisation factor η < 1. Since the exchange-correlation potential is a function of density, by controlling the number density and magnetic field one can control RTI.