Carrier transport in normally-off n GaN/InAlN/AlN/GaN high electron mobility transistors is studied using two-dimensional numerical device simulation. We focus on the n GaN cap layer, which is removed under the gate, and its contribution to drain current. Our simulation results show that despite the high doping density and relatively high carrier concentration in this layer, no significant tran...

A solution to the single level Shockley-Read-Hall rate equations developed recently is applied to two multiple level systems. The two systems considered are the multiple discrete level system and the ground excited state or coupled level system. It is shown that the solution to the differential rate equations for the two multiple level systems derived without an approximation lead to a consiste...

We have measured the magnetotransport properties and Hall effect of a series of epitaxial NbN films grown on (100) oriented single crystalline MgO substrate under different conditions using reactive magnetron sputtering. Hall effect measurements reveal that the carrier density in NbN thin films is sensitive to the growth condition. The carrier density increases by a factor of 3 between the film...

With the help of a simple quantum key distribution (QKD) scheme, we discuss the relation between BB84-type protocols and two-step-type ones. It is shown that they have the same essence, i.e., information-splitting. More specifically, the similarity between them includes (1) the carrier state is split into two parts which will be sent one by one; (2) the possible states of each quantum part are ...

Collective impact ionization has been used to exT1ain lock-on in semi-insulating GaAs under highvohage bias. W7ehave used this theory to study some of the steady state properties of lock-on current filaments. In steady state, the heat gained from the field is exactly compensated by the cooling due to phonon scattering. In the simplest approximation, the carrier distribution approaches a quasi-e...

PURPOSE The purpose of this study was to prepare and characterize solid dispersion formulation of furosemide to enhance dissolution rate. METHODS Solid dispersions with different drug: carrier ratios were prepared by cogrinding method using crospovidone and microcrystalline cellulose as carrier. The physical state and interactions between the drug and carrier were characterized by Fourier tra...

The aim of the article is to check the compatibility of the automorphisms of universal algebras introduced in [10] and the corresponding concept for many sorted algebras introduced in [11]. In this paper U 1 is a universal algebra and f , g are functions from U 1 into U 1. We now state the proposition (1) id the carrier of U 1 is an isomorphism of U 1 and U 1. Let us consider U 1. The functor U...

Since Leyden et al showed in 1974 that 90% of patients with atopic dermatitis (AD) have their skin colonized with Staphylococcus aureus (SA), [1] the increased incidence of a carrier state of SA in patients with AD has been a subject of interest. Several studies in children and adults with AD have demonstrated an increased carrier state of SA in both involved and uninvolved skin. AD is reported...

If a Kalman Filter (KF) is applied to Global Positioning System (GPS) baseband signal preprocessing, the estimates of signal phase and frequency can have low variance, even in highly dynamic situations. This paper presents a novel preprocessing scheme based on a dual-filter structure. Compared with the traditional model utilizing a single KF, this structure avoids carrier tracking being subject...

In many semiconductors, compensating defects set doping limits, decrease carrier mobility, and reduce minority carrier lifetime thus limiting their utility in devices. Native defects are often responsible. Suppressing the concentrations of compensating defects during processing close to thermal equilibrium is difficult because formation enthalpies are lowered as the Fermi level moves towards th...