Zobrazeno 1 - 10
of 270
pro vyhledávání: '"SÉNÉCHAL, DAVID"'
Autor:
Bacq-Labreuil, Benjamin, Lacasse, Benjamin, Tremblay, André-Marie S., Sénéchal, David, Haule, Kristjan
Significant progress towards a theory of high-temperature superconductivity in cuprates has been achieved via the study of effective one- and three-band Hubbard models. Nevertheless, material-specific predictions, while essential for constructing a c
Externí odkaz:
http://arxiv.org/abs/2410.10019
Recent scanning-tunneling microscopy on hole-doped Bi$_2$Sr$_2$CaCu$_2$O$_8$, one of the materials of the cuprate family, finds a long-range ordered spontaneous splitting of the energy levels of oxygen orbitals inside the CuO$_2$ unit cells [S. Wang
Externí odkaz:
http://arxiv.org/abs/2409.15619
Autor:
Bélanger, Mathieu, Sénéchal, David
We study a one-band Hubbard model of twisted bilayer cuprates with a twist angle of $53.13^\circ$. By introducing an inter-layer bias, we simulate heterobilayers of different dopings. Using the variational cluster approximation (VCA) we probe the eff
Externí odkaz:
http://arxiv.org/abs/2311.02207
Autor:
Kundu, Sarbajaya, Sénéchal, David
Publikováno v:
SciPost Phys. Core 7, 033 (2024)
We examine the phase diagram of the extended Hubbard model on a square lattice, for both attractive and repulsive nearest-neighbor interactions, using CDMFT+HFD, a combination of Cluster Dynamical Mean Field theory (CDMFT) and a Hartree-Fock mean-fie
Externí odkaz:
http://arxiv.org/abs/2310.16075
Publikováno v:
Phys. Rev. B 108, 214306 (2023)
In magnetic memories, the state of a ferromagnet is encoded in the orientation of its magnetization. The energy of the system is minimized when the magnetization is parallel or antiparallel to a preferred (easy) axis. These two stable directions defi
Externí odkaz:
http://arxiv.org/abs/2308.11099
Autor:
Bélanger, Mathieu, Sénéchal, David
We study a one-band Hubbard model for a twisted cuprate bilayer with a twist angle of 43.6$^\circ$ and a moire cell containing 58 sites. We use the variational cluster approximation (VCA), which treats short-range correlations exactly and leads, in s
Externí odkaz:
http://arxiv.org/abs/2306.05485
Publikováno v:
SciPost Phys. Codebases 23 (2023)
Pyqcm is a Python/C++ library that implements a few quantum cluster methods with an exact diagonalization impurity solver. Quantum cluster methods are used in the study of strongly correlated electrons to provide an approximate solution to Hubbard-li
Externí odkaz:
http://arxiv.org/abs/2305.18643
The observation of flat energy bands in transition metal dichalcogenide bilayers such as twisted WSe${}_2$ makes those materials interesting prospects for reproducing the behavior observed in graphene-based systems. We use an effective Hubbard model
Externí odkaz:
http://arxiv.org/abs/2209.11724
Autor:
Lu, Xiancong, Sénéchal, David
We study the twisted Hubbard model of a cuprate bilayer at a fixed twist angle $\theta=53.13^{\circ}$ using the variational cluster approximation, a method that treats short-range dynamical correlations exactly. At intermediate interlayer tunneling,
Externí odkaz:
http://arxiv.org/abs/2112.00487