Giant injection magnetoresistance induced by femtosecond laser pulses in semiconductor / granular film heterostructures with cobalt nanoparticles

Autor:	L. A. Shelukhin, L. V. Lutsev
Rok vydání:	2019
Předmět:	History Materials science Magnetoresistance business.industry chemistry.chemical_element Nanoparticle Heterojunction Laser Computer Science Applications Education law.invention Semiconductor chemistry law Femtosecond Optoelectronics business Cobalt
Zdroj:	Journal of Physics: Conference Series. 1400:055009
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/1400/5/055009
Popis:	The light-induced giant injection magnetoresistance in SiO2(Co)/GaAs heterostructures, where the SiO2(Co) structure is the granular SiO2 film with Co nanoparticles, has been studied. It is found that the photocurrent are accompanied by relaxation oscillations caused by the Coulomb influence and transitions between the photocurrent and electrons on the highest level in the interface quantum well. The light-induced magnetoresistance reaches its maximum value in the avalanche onset region and has the local minimum at the higher voltage. The local minimum is explained by delocalization of the highest level in the interface quantum well and by decrease of the probability of the backscattering process of injected electrons on deeper levels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::81ced802067b72b635f6d1b30cfe677a https://doi.org/10.1088/1742-6596/1400/5/055009 Zobrazit plný text záznamu