NON-EQUILIBRIUM STUDY OF CORRELATED HONEYCOMB IRIDATES WITH STRONG SPIN-ORBIT COUPLING.
Tesi di Dottorato
Data di Pubblicazione:
2016
Citazione:
NON-EQUILIBRIUM STUDY OF CORRELATED HONEYCOMB IRIDATES WITH STRONG SPIN-ORBIT COUPLING / N. Nembrini ; supervisor: C. Giannetti ; coordinator: M. Bersanelli. UNIVERSITA' DEGLI STUDI DI MILANO, 2016 Feb 08. 28. ciclo, Anno Accademico 2015. [10.13130/nembrini-nicola_phd2016-02-08].
Abstract:
Transition-metal oxides (TMO) are one of the most studied class of
materials, as a consequence of their rich and exotic physical properties,
mainly determined by the strong electronic correlations of the metal d
electrons. In this thesis I discuss about a particular 5d compound, sodium
iridates, where spin-orbit coupling Coulomb repulsion and bandwidth are
in comparable energy scales.
Furthermore, these systems are Mott insulators and present a zigzag
antiferromagnetic transition below TN 15 K.
Here we tackle the physics of sodium iridates by adopting a nonequilibrium
viewpoint based on the use of ultrafast light pulses combined
in the so-called pump-probe experimental configuration. The aim is to
perturb the antiferromagnetic state of the system via the excitation with a
pump pulse and to observe the ultrafast recovery of the ground state by
means of a second delayed probe pulse. Specifically, we will measure the
dynamics of the pump-induced reflectivity variation in the zigzag
antiferromagnetic and normal states as a function of the probe energy
and as a function of time delay between the pump and the probe pulses.
Tipologia IRIS:
Tesi di dottorato
Elenco autori:
N. Nembrini
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