We have found what we believe to be a universal characteristic of layered superconductors: a positive curvature of the Hc2-versus-Tc boundary. The origins of the effect are believed to be associated ...with strong anisotropies of the Fermi surface and electron-phonon interaction.
A novel approach to Infrared Focal Plane Array fabrication is being investigated at the US Army night vision and electronics sensors directorate. The goal is a demonstration of the feasibility of ...carrying out all epitaxial growth and device processing steps without removing a wafer from the protective environment of a multi-chamber vacuum system.
Existing methods for the detection of nitric oxide are described, and their detection limits noted. The use of a flame ionisation detector is proposed, and the means by which its sensitivity toward ...nitrix oxide can be greatly enhanced is described. Detector operating conditions and response characteristics are given.
Optical constants appropriate for ellipsometric thickness measurements have been determined for strained AlAs and InAs layers on an InP substrate with lattice matched InGaAs buffer layers. A ...procedure involving the simultaneous analysis of data from more than one sample with different layer thicknesses was used. Data acquisition and analysis for large incidence angles demonstrate the possibility of retrofitting growth chambers with an ellipsometer probe for in situ thickness monitoring and control, through existing RHEED ports.< >
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