| Full text | |
| Author(s): |
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Inst Fis, Caixa Postal 66318, BR-05315970 Sao Paulo, SP - Brazil
[2] Gomal Univ, Dept Phys, Dera Ismail Khan 29220, KP - Pakistan
[3] Novosibirsk State Univ, Novosibirsk 630090 - Russia
[4] Inst Semicond Phys, Novosibirsk 630090 - Russia
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | PRAMANA-JOURNAL OF PHYSICS; v. 91, n. 3 SEP 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
Time-resolved Kerr rotation and resonant spin amplification techniques were used to study the spin dynamics in multilayer GaAs / AlGaAs quantum wells. The spin dynamics was regulated through the wave function engineering and quantum confinement in multilayer quantum wells. We observed the spin coherence with remarkably long dephasing time T-2{*}>13 ns for the structure doped beyond metal-insulator transition. Dyakonov-Perel spin relaxation mechanism, as well as the inhomogeneity of electron g-factor, was suggested as the major limiting factor for the spin coherence time. In the metallic regime, we found that the electron-electron collisions become dominant over microscopic scattering on the electron spin relaxation with the Dyakonov-Perel mechanism. Furthermore, the data analysis indicated that in our structure, due to the spin relaxation anisotropy, the Dyakonov-Perel spin relaxation mechanism is efficient for the spins oriented in-plane and suppressed along the quantum well growth direction resulting in the enhancement of T-2{*}. Our findings, namely, long-lived spin coherence persisting up to high temperature, spin polarisation decay time with and without magnetic field, the spin-orbit field, single electron relaxation time, transport scattering time and the electron-electron Coulomb scattering time highlight the attractiveness of n-doped multilayer systems for spin devices. (AU) | |
| FAPESP's process: | 14/25981-7 - Generating and mapping spin currents with space and time resolution |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 15/16191-5 - The research in new materials involving high magnetic fields and low temperatures |
| Grantee: | Gennady Gusev |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 09/15007-5 - Magnetic dynamics in semiconductor nanocrystals |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/03450-7 - The spin Hall effect in semiconductors |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | Regular Research Grants |