Based on spin-density functional theory we calculate the electronic structure of a tunnel junction consisting of two magnetic Fe layers separated by an insulating vacuum barrier selfconsistently. For the conductance the Landauer formula is evaluated in the ballistic limit as function of the magnetic configuration. Based on these conductances the tunnel magnetoresistance (TMR) ratio is obtained....

one of the main concerns of processing algorithms used in synthetic aperture radar (sar) with a ballistic motion is the compensation of all phase errors in the data received from the target to achieve a clear picture of the target. in this article, by using range doppler algorithm and phase-gradient auto focus algorithm, imagery in one sar with a ballistic motion is considered according to the ...

We conducted an experimental and analytical study to understand the mechanisms and dominant parameters for ogive-nose rods and 7.62mm APM2 bullets that perforate 5083-H116 aluminum armor plates. The 20-mm-diameter, 95-mm-long, ogive-nose, 197g, hard steel rods were launched with a gas gun to striking velocities between 230-370m/s. The 7.62-mm-diameter, 10.7g, APM2 bullet consists of a brass jac...

We investigate the effect of different edge types on the statistical properties of both the energy spectrum of closed graphene billiards and the conductance of open graphene cavities in the semiclassical limit. To this end, we use the semiclassical Green’s function for ballistic graphene flakes that we have derived in Reference 1. First we study the spectral two point correlation function, or m...

We investigate the effect of different edge types on the statistical properties of both the energy spectrum of closed graphene billiards and the conductance of open graphene cavities in the semiclassical limit. To this end, we use the semiclassical Green’s function for ballistic graphene flakes [seeJ. Wurm, K. Richter, and İ. Adagideli, Phys. Rev. B 84, 075468 (2011)]. First, we study the spect...

We report measurements of quantum turbulence generated by a vibrating grid in superfluid HeB at zero pressure in the zero temperature limit. Superfluid flow around individual vortex lines Andreev-reflects incoming thermal ballistic quasiparticle excitations, and allows non-invasive detection of quantum vortices in He-B. We have compared two Andreev reflection-based techniques traditionally used...

With a brief introduction to ballistic phenomenon, the theory, fabrication, working and plausible applications of some ballistic devices are presented. Index – Heterostructure semiconductor, 2DEG, Electron Mobility, Mesoscopic Structure, Ballistic Transport, Ballistic Devices

  Ceramic materials due to their high compressive strength and hardness have been one of prime candidates in armor design in particular when high level threads (impact velocity above 600m/s) are involved. The aim of this work is to investigate ballistic impact resistance potential for a target plate with novel ceramic inserts as against ceramic tiles. Two size 98% alumina (AL2O3) base ceramic i...

We study the effect of a dilute homogeneous spatial distribution non-magnetic impurities on equilibrium supercurrent sustained by ballistic graphene Josephson junction in short limit. Within Dirac-Bogoliubov-de Gennes approach and modeling Anderson model we derive its power spectrum. find modification current-phase relation with reduction skewness induced disorder, nonmonotonic temperature depe...