Banca de QUALIFICAÇÃO: DANIEL CRIZOSTOMO DA COSTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DANIEL CRIZOSTOMO DA COSTA
DATE: 15/03/2024
TIME: 14:00
LOCAL: REMOTO
TITLE:

Superconductivity in flat bands in the square-otagon lattice

KEY WORDS:

Lattice square-octagon; Flat band; Superconductivity;

PAGES: 40
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUBÁREA: Física da Matéria Condensada
SUMMARY:

The superconducting state in conventional superconductors is achieved when a metal is subjected to temperatures near absolute zero. However, obtaining such low temperatures requires sophisticated techniques, making some applications impractical. In this work, conditions for the emergence of flat bands in the square-octagon lattice were investigated. As a result, four bands were identified, with two being dispersive and two being flat. Interestingly, one dispersive band is sandwiched between two flat bands. The other dispersive band found is isolated from the remaining bands. However, this latter band
does not contribute to the formation of the superconducting state. Therefore, a model featuring a dispersive band sandwiched between two flat bands was considered. Finally, an attractive interaction was introduced, leading to the self-consistent equation for the critical temperature, resulting in a superconducting phase diagram resembling those measured for unconventional superconductors

BANKING MEMBERS:
Interno - 1217987 - ANDRE LUIZ MOTA
Interno - 1212928 - HERON CARLOS DE GODOY CALDAS
Presidente - 1672479 - LIZARDO HENRIQUE CERQUEIRA MOREIRA NUNES