mai
08
2014
A possible roadmap for spintronic devices in wide bandgap semiconductors
By intranet
Prof. Lucy Assali investigate the eletronic properties of lanthanide impurities (from Eu to Tm) in wurtzite gallium nitride and zinc oxide in a collaboration paper between the Institute of Physics and the Polytechnic School of the University of São Paulo. The first principles calculations results indicated that the 4f-related energy levels remain outside the bandgap in both materials.
A new scanning probe microscope (SPM), model ICON from Bruker, was recently installed (March 19, 2013) at the New Semiconductor Materials Laboratory (LNMS) of the Solid-State Department (DFMT). The system is able to measure large wafers with a diameter up to 6", and is equiped with the atomic force, magnetic force, electrical force, scanning tunneling, and surface potential (Kelvin) modes.
The article "Bilayer graphene on h-BN substrate:
From the new Landolt-Börnstein series, Springer release the Semiconductors volume III-44e by DFMT author Profª Euzi Conceição Fernandes da Silva. This book is co-authored by D. Strauch and edited by U. Rössler. 
A new electron-beam deposition system, model NEXDEP from Angstrom Engineering, fully automated (vacuum and deposition functions), having six 7cc pockets and a 6 kW power supply, was recently installed (May 15, 2013) in the New Semiconductor Materials Laboratory (LNMS) of the DFMT.
A new mask aligner, model 206IR from OAI, was recently installed (June 10, 2013) at the New Semiconductor Materials Laboratory (LNMS) of the DFMT. The system is able to handle 6" wafers and can operate in soft, hard or vacuum mode, using front or backside illumination (with infrared radiation). It was installed in a clean and yellow room, and will be used for optical lithography with a resolution down to 1 um, in order to p
In a recent publication in Physical Review B Rapid Communications, the first experimental observation of the spin Hall effect in a high-mobility two-dimensional electron gas was reported. The study was completely developed in the LNMS at DFMT-IFUSP by Prof. Felix Hernandez, Prof. Gennady Gusev and Leonardo Nunes (M.Sc. student).
A new class of nonequilibrium phenomena is expected when a low-dimensional electron gas, subjected to a weak magnetic field, is also irradiated with microwaves. In a recent publication, an experimental work in the LNMS at DFMT-IFUSP provides evidence for an edge-state current stabilized by microwave irradiation.