New nanooptical and nanoelectronic systems: characterization and application

• Grant number: 11/17944-6
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2012
• End date: October 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Victor Lopez Richard
• Grantee: Daniel Ferreira Cesar
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated scholarship(s): 12/21264-3 - Theoretical study of magnetic defects in CdSe: from bulk to quantum dots, BE.EP.PD

Abstract

This project proposes a sequence of tasks related to the systematic investigation of the optical response and electronic properties of semiconductor quantum dots of different geometries and compositions that offer interesting possibilities for manipulation of the electronic structure and the study of new quantum phenomena. This contribution is part of a collaboration between experimental growth and spectroscopy groups and theoretical coworkers that treat problems related to the manipulation of spin states in quasi-zero dimensional systems with cylindrical symmetry and ring shape (quantum rings). Such a project would contribute to the support for the nucleation of these lines of research. Our goals cover the theoretical and experimental study of semi-magnetic quantum dots (grown on the basis of CdMnSe) and non-magnetic (grown on the basis of GaInAs), with new structural properties with which one may control separately the effects of conduction and valence bands. Thus, two basic lines of work will be addressed here: i) Simultaneous measurement and characterization of spin-dependent optical phenomena in these samples, ii) the theoretical simulation of optical effects and transport properties related to the spin of carriers in these systems with confined states. The elucidation of anomalous magnetic effects detected experimentally under certain growth conditions and thermal treatment of the samples will determine the theoretical commitments described herein.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LOPES-OLIVEIRA, V.; HERVAL, L. K. S.; ORSI GORDO, V.; CESAR, D. F.; DE GODOY, M. P. F.; GALVAO GOBATO, Y.; HENINI, M.; KHATAB, A.; SADEGHI, M.; WANG, S.; et al. Strain and localization effects in InGaAs(N) quantum wells: Tuning the magnetic response. Journal of Applied Physics, v. 116, n. 23, DEC 21 2014. (13/17657-2, 12/24055-6, 11/17944-6, 12/02655-1)

ARAGON, F. H.; COAQUIRA, J. A. H.; VILLEGAS-LELOVSKY, L.; DA SILVA, S. W.; CESAR, D. F.; NAGAMINE, L. C. C. M.; COHEN, R.; MENENDEZ-PROUPIN, E.; MORAIS, P. C.. Evolution of the doping regimes in the Al-doped SnO2 nanoparticles prepared by a polymer precursor method. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 27, n. 9, MAR 11 2015. (11/17944-6)