@article{ISI:000518909000001,
 abstract = {Various angle-dependent measurements in hole-doped cuprates suggested
that non-Fermi liquid (NFL) and Fermi-liquid (FL) self-energies coexist
in the Brillouin zone. Moreover, it is also found that NFL self-energies
survive up to the overdoped region where the resistivity features a
global FL-behavior. To address this problem, we compute the momentum
dependent self-energy from a single band Hubbard model. The self-energy
is calculated self-consistently by using a momentum-dependent
density-fluctuation (MRDF) method. One of our main results is that the
computed self-energy exhibits a marginal-FL (MFL)-like frequency
dependence only in the antinodal region, and FL-like behavior elsewhere
at all dopings. The MFL self-energy stems from the fluctuations between
the itinerant and localized densities-a result that appears when
self-energy is calculated self-consistently and features an intermediate
coupling behavior of cuprates. We also calculate the DC conductivity by
including the full momentum dependent self-energy. We find that the
resistivity-temperature exponent n becomes 1 near the optimal doping,
while the MFL self-energy occupies largest momentum-space volume.
Surprisingly, even in the NFL state near the optimal doping, the nodal
region contains FL-like self-energies; while in the under-and
over-dopings (n similar to 2), the antinodal region remains NFL-like.
These results highlight the non-local correlation physics in cuprates
and in other similar intermediately correlated materials, where a direct
link between the microscopic single-particle spectral properties and the
macroscopic transport behavior can not be well established.},
 article-number = {365603},
 author = {Ray, Sujay and Das, Tanmoy},
 doi = {10.1088/1361-648X/ab25b8},
 eissn = {1361-648X},
 issn = {0953-8984},
 journal = {JOURNAL OF PHYSICS-CONDENSED MATTER},
 month = {SEP 11},
 number = {36},
 times-cited = {0},
 title = {Theory of angle-dependent marginal Fermi liquid self-energy and its
existence at all dopings in cuprates},
 unique-id = {ISI:000518909000001},
 volume = {31},
 year = {2019}
}