INVESTIGADORES
GRECO Andres Francisco
artículos
Título:
Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature
Autor/es:
GUILLERMO BUZON, ADRIANA FOUSSATS, MAT ́ ıAS BEJAS, AND ANDR ́ ES GRECO
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Sociaty
Referencias:
Año: 2014 vol. 89 p. 1 - 9
ISSN:
0163-1829
Resumen:
Hole-doped cuprates show a superconducting critical temperature
T
c
which follows a universal dome-shaped
behavior as a function of doping. It is believed that the origin of superconductivity in cuprates is entangled with the
physics of the pseudogap phase. An open discussion is whether the source of superconductivity is the same effect
that causes the pseudogap properties. The
t
-
J
model treated in large-
N
expansion shows
d
-wave superconductivity
triggered by nonretarded interactions, and an instability of the paramagnetic state to a flux phase or
d
-wave
charge-density wave (
d
-CDW) state. In this paper we show that self-energy effects near the
d
-CDW instability
may lead to a dome-shaped behavior of
T
c
. In addition, it is also shown that these self-energy contributions may
describe several properties observed in the pseudogap phase. In this picture, although fluctuations responsible
for the pseudogap properties lead to a dome-shaped behavior, they are not involved in pairing, which is mainly
nonretarded.