Zobrazeno 1 - 10
of 503
pro vyhledávání: '"Johnston Steven"'
Autor:
Naamneh, Muntaser, Paris, Eugenio, McNally, Daniel, Tseng, Yi, Pudelko, Wojciech R., Gawryluk, Dariusz J., Shamblin, J., OQuinn, Eric, Cohen-Stead, Benjamin, Shi, Ming, Radovic, Milan, Lang, M., Schmitt, Thorsten, Johnston, Steven, Plumb, Nicholas C.
Bipolaronic superconductivity is an exotic pairing mechanism proposed for materials like Ba$_{1-x}$K$_x$BiO$_3$ (BKBO); however, conclusive experimental evidence for a (bi)polaron metallic state in this material remains elusive. Here, we combine reso
Externí odkaz:
http://arxiv.org/abs/2408.00401
We perform sign-problem-free determinant quantum Monte Carlo simulations of the optical Su-Schrieffer-Heeger (SSH) model on a half-filled honeycomb lattice. In particular, we investigate the model's semi-metal (SM) to Kekul{\'e} Valence Bond Solid (K
Externí odkaz:
http://arxiv.org/abs/2407.09366
Autor:
Neuhaus, James, Nichols, Nathan S., Banerjee, Debshikha, Cohen-Stead, Benjamin, Maier, Thomas A., Del Maestro, Adrian, Johnston, Steven
We introduce the SmoQyDEAC.jl package, a Julia implementation of the Differential Evolution Analytic Continuation (DEAC) algorithm [N. S. Nichols et al., Phys. Rev. E 106, 025312 (2022)] for analytically continuing noisy imaginary time correlation fu
Externí odkaz:
http://arxiv.org/abs/2407.04568
We employ a classical limit grounded in SU(4) coherent states to investigate the temperature-dependent dynamical spin structure factor of the $S = 1/2$ ladder consisting of weakly coupled dimers. By comparing the outcomes of this classical approximat
Externí odkaz:
http://arxiv.org/abs/2405.16315
Most nonperturbative numerical studies of electron-phonon interactions focus on model Hamiltonians where the electrons interact with a phonon branch via a single type of microscopic mechanism. Two commonly explored couplings in this context are the H
Externí odkaz:
http://arxiv.org/abs/2403.15386
Autor:
Cohen-Stead, Benjamin, Costa, Sohan Malkaruge, Neuhaus, James, Ly, Andy Tanjaroon, Zhang, Yutan, Scalettar, Richard, Barros, Kipton, Johnston, Steven
We introduce the SmoQyDQMC.jl package, a Julia implementation of the determinant quantum Monte Carlo algorithm. SmoQyDQMC.jl supports generalized tight-binding Hamiltonians with on-site Hubbard and generalized electron-phonon interactions, including
Externí odkaz:
http://arxiv.org/abs/2311.09395
A comparative study of the superconductivity in the Holstein and optical Su-Schrieffer-Heeger models
Theoretical studies suggest that Su-Schrieffer-Heeger-like electron-phonon ($e$-ph) interactions can mediate high-temperature bipolaronic superconductivity that is robust against repulsive electron-electron interactions. Here we present a comparative
Externí odkaz:
http://arxiv.org/abs/2307.10809
Autor:
Costa, Sohan Malkaruge, Cohen-Stead, Benjamin, Ly, Andy Tanjaroon, Neuhaus, James, Johnston, Steven
We compare the acoustic Su-Schrieffer-Heeger (SSH) model with two of its optical variants where the phonons are defined on either on the sites or bonds of the system. First, we discuss how to make fair comparisons between these models in any dimensio
Externí odkaz:
http://arxiv.org/abs/2307.10058