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Energetics of superconductivity in the two dimensional Hubbard model
Emanuel Gull, Andrew J. Millis
The energetics of the interplay between superconductivity and the pseudogap in high temperature superconductivity is examined using the eight-site dynamical cluster approximation t…
Sum rule violation in self-consistent hybridization expansions
Andreas Rüegg, Emanuel Gull, Gregory A. Fiete +1
We show that for multi-orbital quantum impurity models the non-crossing approximation and one-crossing approximation versions of the self-consistent hybridization expansions violat…
Spin-exchange-induced dimerization of an atomic 1-D system
Nader Zaki, Chris A. Marianetti, Danda P. Acharya +6
Using low-temperature scanning tunneling microscopy, we demonstrate an unambiguous 1-D system that surprisingly undergoes a CDW instability on a metallic substrate. Our ability to…
Suppression of superconductivity by Neel-type magnetic fluctuations in the iron pnictides
Rafael M. Fernandes, Andrew J. Millis
Motivated by recent experimental detection of Neel-type () magnetic fluctuations in some iron pnictides, we study the impact of competing and spin fluctuatio…