Banca de DEFESA: HERNÁN GUILLERMO BUENO XAVIER

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : HERNÁN GUILLERMO BUENO XAVIER
DATA : 28/02/2019
HORA: 10:00
LOCAL: Auditório do DFTE
TÍTULO:

 An Effective Model for Strongly Correlated Electrons

PALAVRAS-CHAVES:

strongly correlated electrons; $t$-$J$ model; high-$T_c$ cuprates; quantum effective field theory.

PÁGINAS: 72
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
RESUMO:

In this work we examine an alternative effective formulation for the $t$-$J$ model which is believed
to capture the essential physics behind the underdoped regime of the high-$T_c$ cuprates. After recasting
the original problem in this new representation, we check the consistency of our procedure and discuss
some physical consequences of such a representation including, the crossover between the regimes of small
and large Fermi surfaces which is observed experimentally. We then explore the possiblity of constructing a
path integral representation for the $t$-$J$ quantum partition function departing from the proposed
formulation. Finally, we use the latter formalism to derive a continuum effective field theory in $(2+1)$
spacetime dimensions which features small hole-like pockets near the nodal regions of the Brillouin zone
along with an unconventional mechanism for superconductivity.

MEMBROS DA BANCA:
Presidente - 404927 - ALVARO FERRAZ FILHO
Externo à Instituição - EVGENII KOCHETOV
Interno - 2313663 - RODRIGO GONCALVES PEREIRA