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pro vyhledávání: '"Ndiaye C"'
The Emery model, or three-band Hubbard model, is a Hamiltonian that is thought to contain much of the physics of cuprate superconductors. This model includes two noninteracting $p$ orbitals and one interacting $d$ orbital per unit cell. Few methods t
Externí odkaz:
http://arxiv.org/abs/2308.14091
Publikováno v:
Phys. Rev. B 109, 075143 (2024)
The Kane-Mele model is known to show a quantized spin Hall conductivity at zero temperature. Including Hubbard interactions at each site leads to a quantum phase transition to an XY antiferromagnet at sufficiently high interaction strength. Here, we
Externí odkaz:
http://arxiv.org/abs/2307.15652
Publikováno v:
Phys. Rev. B 108, 075144 (2023)
The two-particle self-consistent approach (TPSC) is a method for the one-band Hubbard model that can be both numerically efficient and reliable. However, TPSC fails to yield physical results deep in the renormalized classical regime of the bidimensio
Externí odkaz:
http://arxiv.org/abs/2305.19219
Publikováno v:
Phys. Rev. B 107, 075158 (2023)
Theoretical methods that are accurate for both short-distance observables and long-wavelength collective modes are still being developed for the Hubbard model. Here, we benchmark an approach that combines dynamical mean-field theory (DMFT) observable
Externí odkaz:
http://arxiv.org/abs/2211.01919
Publikováno v:
Phys. Rev. B 105, 235133 (2022)
Antiferromagnetic fluctuations in two dimensions cause a decrease in spectral weight at so-called hot spots associated with the pseudogap in electron-doped cuprates. In the 2D Hubbard model, these hot spots occur when the Vilk criterion is satisfied,
Externí odkaz:
http://arxiv.org/abs/2205.00066
Resilient Fermi liquid and strength of correlations near an antiferromagnetic quantum critical point
Publikováno v:
Phys. Rev. Lett. 128, 087001, 2022
Near the antiferromagnetic quantum critical point (QCP) of electron-doped cuprate superconductors, angle-resolved photoemission experiments detect hot spots where the Fermi surface disappears. Here we demonstrate, using the two-particle self-consiste
Externí odkaz:
http://arxiv.org/abs/2111.08059
Autor:
Mawi, H., Ndiaye, C. B.
In this note, we show that a natural optimal control problem for the $\infty$-obstacle problem admits an optimal control which is also an optimal state. Moreover, we show the convergence of the minimal value of an optimal control problem for the $p$-
Externí odkaz:
http://arxiv.org/abs/2007.01957
Autor:
NdiayeDiop, M.T., Ndiaye, M., Seck, B., Diop, A., Diop, K., Sarr, M., Ndour, N., Deh, A., Ndiaye, C., Diatta, B.A., Niang, B., Thiongane, A., Ba, I.D., Faye, P.M., Diallo, M., Ly, F., Niang, S.O.
Publikováno v:
In Revue Française d'Allergologie May 2023 63(4)
Autor:
Gauvin-Ndiaye, C., Baker, T. E., Karan, P., Massé, É., Balli, M., Brahiti, N., Eskandari, M. A., Fournier, P., Tremblay, A. -M. S., Nourafkan, R.
Publikováno v:
Phys. Rev. B 98, 125132 (2018)
The search for room-temperature magnetocaloric materials for refrigeration has led to investigations of double perovskites. In particular, a puzzle has appeared in the La$_2$MnNiO$_6$, La$_2$MnCoO$_6$ and La$_2$MnFeO$_6$ family of compounds. They sha
Externí odkaz:
http://arxiv.org/abs/1809.07812
Publikováno v:
Phys. Rev. B 99, 125110, 2019
Magnetic refrigeration at room-temperature is a technology that could potentially be more environmentally-friendly, efficient and affordable than traditional refrigeration. The search for suitable materials for magnetocaloric refrigeration led to the
Externí odkaz:
http://arxiv.org/abs/1809.07813