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
Profs. Rafael Freitas - Jason S. Gardner
(open positions: Doutorado Sandwich no Exterior e Pós-Doutorado Junior)
This scientific research project is designed to develop a long-term international collaborative research and education effort among research teams in the Physics Department at Indiana University (IU) and the Institute of Physics at the University of São Paulo (USP). The research focuses on the topical theme of frustrated magnetism and will concentrate on the low temperature magnetic, thermal and transport properties of these materials. The visiting researcher Jason S. Gardner from Indiana University will spend between 4 and 6 weeks per year, for three years at USP supervising sample growth and researching the low temperature bulk properties of various frustrated magnets. The bulk characterization will be performed in a broad range of temperatures and magnetic fields current available at the Solid State and Low Temperature Laboratory - USP. Once characterized these materials will be studied at large scale facilities by neutrons, muons and X-rays by researchers from IU and USP. All these studies will be performed with graduate and post graduate students from USP and complimented with graduate level tutorials on neutron scattering and frustrated magnetism.
Project 2. Gyromagnetic Factors in Semiconductor Nanostructures
Profs. Andre Henriques - Paul Koenraad.
(open positions: Doutorado Sandwich no Exterior e Pós-Doutorado Junior)
We want advance the understanding and control of the g-factor of charge carriers confined to semiconductor nanostructures. We want to use time-resolved birefringence (Faraday rotation and ellipticity), as well as Zeeman splitting experiments, to study the g-factor tensors that describe the precession of electrons and holes confined in semiconductor nanostructures. These experiments will be performed either on ensembles of semiconductor nanostructures of different size, shape and composition or just a single quantum dot. The charge carriers confined in the zero-dimensional nanotructures will be controlled externally by light or an electric signal, thereby allowing us to investigate the g-factor dependence on the number and quantum state of confined electrons and holes.
