On Tuesday January 23th 2024, we have the pleasure to welcome in SPINTEC Armando Pezo-Lopez from Laboratoire Albert Fert (CNRS, Thales, Univ. Paris-Saclay). He will give us a seminar at 14:00 entitled :
Theory and numeric simulations for Spintronics and Orbitronics
Place : IRIG/SPINTEC, auditorium 445 CEA Building 10.05 (access to CEA requires an entry authorization. Request it before January 15th at admin.spintec@cea.fr)
video conference : https://univ-grenoble-alpes-fr.zoom.us/j/97758661822?pwd=S2ExOEYvSXhYU20xeVRGZEFrV0R6UT09
Meeting ID: 977 5866 1822
Passcode: 025334
Abstract : The always fast-growing field of spintronics faces the usual challenges and inherent difficulties of manipulating quantum mechanical ingredients providing new ways to solve such problems. The recent discovery of the Orbital Hall effect [1] lead to new proposals for manipulating the spin degree of freedom without heavy large-Z materials, in that sense, overcoming the scarcity of materials for developing new devices. On the other hand, it’s still unclear to what extent this new ‘orbital’ degree of freedom is affected by decoherence and disorder effects, furthermore, being the angular moment a non-conserved quantity in solids [2], the efficiency of such mechanism is currently under scrutiny.
In this talk, I’ll give a short introduction to this new branch of spintronics so-called Orbitronics whereby using numerical simulations we were able to characterize and measure some physical quantities as the Hall conductivity and spin/orbital accumulation in a realistic setup. I’ll then present some recent developments in Bi(1-x)Sbx [3] where the orbital quantum number is also considered, as well as some comments on Thz emission and a new kind of symmetry dependent Hall effect [4].
- 1. Hayashi, H., Jo, D., Go, D. et al. Commun Phys 6, 32 (2023). https://doi.org/10.1038/s42005-023-01139-7.
- 2. Pezo A., Ovalle D., Manchon A. https://doi.org/10.1103/PhysRevB.106.104414
- 3. E. Rongione, L. Baringthon, D. She, et al. https://doi.org/10.100/advs.202301124
- 4. Liang L. Pezo A., et al. https://pubs.acs.org/doi/10.1021/acs.nanolett.3c04242.
