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20 papers · 1 filter
Effect of superconducting fluctuations on ultrasound in unconventional superconductor
M. S. Mar'enko, C. Bourbonnais, A. -M. S. Tremblay
We study the renormalization of sound attenuation and sound velocity by fluctuation Cooper pairs in layered superconductors. We consider the influence of s- and d-wave symmetry of…
Neel order, ring exchange and charge fluctuations in the half-filled Hubbard model
J. -Y. P. Delannoy, M. J. P. Gingras, P. C. W. Holdsworth +1
We investigate the ground state properties of the two dimensional half-filled one band Hubbard model in the strong (large-U) to intermediate coupling limit ({\it i.e.} away from th…
Dynamical Breakup of the Fermi Surface in a doped Mott Insulator
M. Civelli, M. Capone, S. S. Kancharla +2
The evolution from an anomalous metallic phase to a Mott insulator within the two-dimensional Hubbard model is investigated by means of the Cellular Dynamical Mean-Field Theory. We…
Competition between Antiferromagnetism and Superconductivity in High Cuprates
David Senechal, P. -L. Lavertu, M. -A. Marois +1
Using variational cluster perturbation theory we study the competition between d-wave superconductivity (dSC) and antiferromagnetism (AF) in the the t-t'-t''-U Hubbard model. Large…
The cohomology structure of string algebras
Juan Carlos Bustamante
We show that the graded commutative ring structure of the Hochschild cohomology HH*(A) is trivial in case A is a triangular quadratic string algebra. Moreover, in case A isgentle,…
Unification of electromagnetic noise and Luttinger liquid via a quantum dot
Karyn Le Hur, Mei-Rong Li
We investigate the effect of dissipation on a small quantum dot (resonant level) tunnel-coupled to a chiral Luttinger liquid (LL) with the LL parameter . The dissipation stems f…