Obtained his PhD in Physics at the Catholic University of Rio de Janeiro (1984), PostDoctoral fellow at Oxford University (1986-1988). Full Professor at the Physics Institute of the Sao Paulo University. His research is focused on spintronics, nanostructures, optomagnetism, ultrafast optical processes, non-linear optics, for more please visit http://romeo.if.usp.br/~andreh/lmo/pesquisa.html (Source: Lattes Curriculum)
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Recently, our Research Group discovered that light can induce giant, supergiant and hypergiant spin polarons (SPs) in intrinsic magnetic semiconductors - EuX europium chalcogenides (X = O, S, Se, Te). The magnetic moment of these spin polarons is ten, one hundred and one thousand times greater than the values known so far. The induction of gigantic SPs by a single photon opens a new way t…
Ultra-short pulses of light, so-called pump pulses, will be used to alter the optical, magnetic, vibrational, and superconductivity properties of matter. The effect of the incident pulses on the state of matter will also be monitored using light pulses, the so-called probe pulses. Monitoring will be performed with femtosecond resolution. This technique for controlling the state of matter …
Changing the magnetic state of matter at will and in the ultrashort time scale is a subject of vast contemporary interest. In this project we shall investigate the optical control of magnetism in a variety of semiconductor materials. Light will be used both to induce as well as to monitor the magnetic state. We shall investigate the steady magnetism, as well as the transient one, using op…
Optical control of magnetic order will be investigated in various materials. Our previous resultsshowed that, in non-magnetic semiconductor quantum dots containing electrons, light can inducemagnetic order, due to the electron-photon interaction, which brings about the alignment, alonga preferential direction, of the spin of the electrons confined in the dots. Our previous results also sh…
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Europium chalcogenides are important magnetic semiconductors that have a potential for applications in spintronic devices. Here we shall investigate EuTe and EuSe epitaxial layers, grown by molecular beam epitaxy, to gather new experimental evidence that will improve our understanding of the electronic processes in these systems. The experiments that will be performed include time-resolve…
Europium chalcogenides are important magnetic semiconductors that have a potential for applications in spintronic devices. They share the common property of having a large magnetic moment at the lattice sites occupied by europium, and their magneto-optical properties can be described by the same semi-empirical model, albeit with different parameters. Here we propose to investigate PbEuTe …
| 1 / 1 | Ongoing research grants |
| 13 / 8 | Completed research grants |
| 3 / 0 | Completed scholarships in Brazil |
| 2 / 2 | Completed scholarships abroad |
| 19 / 11 | All research grants and scholarships |
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