Abstracts Book - IMRC 2018

• SF2-P043
ELECTRON-NUCLEAR SPIN DYNAMICS OF GA CENTERS IN GAASN
DILUTE NITRIDE SEMICONDUCTORS PROBED BY PUMP-PROBE
SPECTROSCOPY
Juan Carlos Sandoval Santana 1 , Víctor Ibarra Sierra 1 , Sawsen Azaizia 2 , Helene Carrère 2 , Leonid
Bakaleinikov 3 , Vladimir Kalevich 3 , Eugeneous Ivchenko 3 , Xavier Marie 2 , Thierry Amand 2 , Andrea
Balocchi 2 , Alejandro Kunold 4
1 Universidad Autónoma Metropolitana, Departamento de Física, Mexico. 2 Universitè de
Toulouse, INSA-CNRS-UPS, LPCNO, Quantum Optoelectronics, France. 3 Ioffe Physical-Technical
Institute, Laboratory of Optics of Semiconductors, Russia. 4 Universidad Autónoma
Metropolitana, Área de Física Teórica y Materia Condensada, Mexico.
We propose an experimental procedure to track the evolution of electronic and
nuclear spins in Ga 2+ centers in GaAsN dilute semiconductors. The method is
based on a pump-probe scheme that enables to monitor the time evolution of
the three components of the electronic and nuclear spin variables. In contrast
to other characterization methods, as nuclear magnetic resonance, this one only
needs moderate magnetic fields (B≈10 mT) and does not require microwave
irradiation. Specifically, we carry out a series of tests for different experimental
conditions in order to optimize the procedure for maximum sensitivity in the
measurement of the circular degree of polarization. Based on previous
experimental results and the theoretical calculations presented here, we
estimate that the method could yield a time resolution of about 10 ps.
Keywords: Hyperfine interaction, Master equation, Spintronics
Presenting authors email: jcss@xanum.uam.mx