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A possible roadmap for spintronic devices in wide bandgap semiconductors

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.

Português, Brasil

Research Highlight from the Superconductivity Group

A neutron diffraction study by Prof. Renato F. Jardim in collaboration with UNICAMP, NIST and the San Diego State University determined the magnetic properties of the Sr2YRuO6 system. The data revealed planar magnetic correlations that condense into a partial long-range ordered state with coupled alternate antiferromagnetic YRuO4 square layers coexisting with the short-range correlations.

Português, Brasil

The Quantum Hall Effect in Topological Insulator-n Junctions x

In collaboration with the Institute of Semiconductor Physics from Russia, Prof. Gennady Gusev studied the quantized transport in HgTe wells with inverted band structure corresponding to the two-dimensional topological insulator phase (2D TI) with locally controlled density allowing n-p-n and n-2D TI-n junctions.

Português, Brasil

VSM Installation at DFMT

In the last weeks of January, a vibrating sample magnetometer - VSM was installed in the Laboratory of Magnetic Materials. This equipment, model 7404 from LakesShore is used to characterize the DC magnetic properties of materials as a function of magnetic field, temperature, and time.

Português, Brasil

Studies in quantum magnetics at low temperatures and high magnetic fields that defy classical description

Bose-Einstein condensation occurs when a system of quantum-mechanical particles with integer  spin or angular momentum is cooled to its ground state and forms a coherent state of identical particles. The Bose-Einstein condensate (BEC) occurs in systems that satisfy two requirements: bosonic behavior and number conservation. It is this second requirement that limits the prevalence of BEC systems in nature. BECs were first identified in dilute collections of laser-cooled cold atoms in 1995, leading to the Nobel Prize.

Português, Brasil

II Mário Schenberg Meeting: Half Century of Low Temperatures at USP

The second edition of the MS Meeting (November 21-22) celebrated the 50th anniversary of the LESBT - Laboratório de Estado Sólido e Baixas Temperaturas. The event program was centered in this laboratory history, pioneer in the development of low temperatures in Brazil, and filled by scientific lectures and historical keynotes given by DFMT members and invited speakers.

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Science without Borders

In the program for "Special Visiting Researcher", aimed to attract foreign researchers recognized internationally as leadership, DFMT will receive Profs. Jason S. Gardner (Indiana University) and Paul Koenraad (Eindhoven University of Technology). 

Project 1. Geometrically Frustrated Pyrochlore Magnets

Português, Brasil

Young Author Award

O professor Ronaldo Rodrigues Pelá, do Departamento de Física do ITA, foi premiado na Conferência Internacional de Física de Semicondutores (ICPS) ocorrida de 29/07 a 03/08 no ETH em Zurique.

Português, Brasil

Topological Insulators at FMT

In field of topological insulators, the article "Nonlocal Transport Near Charge Neutrality Point in a Two-Dimensional Electron-Hole System” published in PRL 108, 226804 (2012) by Prof. Gusev, Prof. Levine and collaborators was selected for the Virtual Journal of Nanoscale Science and Technology.   

Português, Brasil

Transport under Microwaves

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.
“ Microwave-induced nonlocal transport in a two-dimensional electron system”

Português, Brasil

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