Banca de DEFESA: Railson da Conceição Vasconcelos

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Railson da Conceição Vasconcelos
DATE: 14/08/2023
TIME: 09:00
LOCAL: Auditório do Instituto de Física
TITLE:

Theoretical Modeling of Magnesium Dichloride Monolayers and Nanoribbons for Applications in Spintronics: A Study of Doping, passivation, and quantum transport.

KEY WORDS:

Nanoelectronics, monolayer, nanoribbon, quantum transport, density functional theory, spintronics.

PAGES: 137
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Our recent breakthroughs in manipulating matter at the atomic scale have opened up new possibilities for creating and designing highly efficient electronic devices. With this goal in mind, this study utilizes first-principles techniques to investigate the control of magnesium dichloride monolayers (MgCl2) for technological applications. We begin by examining the effects of substitutional doping in monolayers and then advance to the study of quantum transport in nanoribbons of the same material. Our results indicate that both the monolayers and nanoribbons of MgCl2 exhibit ideal properties for spintronic applications. Substitutional doping of the MgCl2 monolayers with different dopant groups proves efficient in inducing magnetism in the material. All pristine MgCl2 nanoribbons with different edge terminations are stable. Depending on the atoms at the zigzag edge of the nanoribbons, it is possible to induce the half-metallic state and achieve perfect spin filtering. The passivation of the MgCl2 nanoribbons is not only effective in increasing the system’s stability but also in modulating its electronic and magnetic properties, enabling the creation of perfect spin filters and spin bipolar diodes with dual rectification. Therefore, this work highlights the remarkable potential of MgCl2 crystals for applications in nanoelectronics and spintronics.

COMMITTEE MEMBERS:
Externa à Instituição - CECILIA COLETTI - UDS di Pavia
Externo à Instituição - IGO TORRES LIMA - UFMA
Interno - 2224741 - LUIZ ANTONIO RIBEIRO JUNIOR
Interno - 1764408 - PAULO EDUARDO NARCIZO DE SOUZA
Presidente - 1273560 - RICARDO GARGANO