33 citations · 187 across the 22 of their papers we have counts for
23 papers
The half-filled optical Su-Schrieffer-Heeger-Hubbard model with uniaxial strain
Jonah Huang, James Neuhaus, Benjamin Cohen-Stead +2
Strain offers a direct route to control electronic phases by altering bond lengths, hopping amplitudes, and lattice symmetries. These aspects make electron-phonon (e-ph) coupled sy…
A DQMC study of the spectral and conductive properties of the two-dimensional Holstein model
J. Neuhaus, B. Cohen-Stead, N. Mannella +1
We study the dynamical properties of the two-dimensional square lattice Holstein Hamiltonian using numerically exact determinant quantum Monte Carlo simulations. In particular, we…
SmoQyElPhQMC.jl: An open-source Julia package for efficient and scalable quantum Monte Carlo simulations of electron-phonon coupled models
Benjamin Cohen-Stead, James Neuhaus, Kipton Barros +2
We introduce version 1.0 of the SmoQyElPhQMC.jl package, an open-source Julia code for performing scalable quantum Monte Carlo simulations of electron-phonon coupled model Hamilton…
The optical Su-Schrieffer-Heeger model on a triangular lattice
Max Casebolt, Sohan Malkaruge Costa, Benjamin Cohen-Stead +2
We study the triangular lattice optical Su-Schrieffer-Heeger (SSH) model using determinant quantum Monte Carlo. By varying the model's carrier concentration, electron-phonon coupli…
Charge Order in the half-filled bond-Holstein Model
Charles Jordan, George Issa, Ehsan Khatami +3
We use determinant quantum Monte Carlo to study the half-filled `bond-Holstein' model on a square lattice. We find that the model exhibits a charge-density-wave (CDW) phase transit…
Antiferromagnetism and Kekulé valence bond order in the honeycomb optical Su-Schrieffer-Heeger-Hubbard model
Sohan Malkaruge Costa, Benjamin Cohen-Stead, Steven Johnston
The precise role of e-ph coupling in graphene and related materials on a honeycomb lattice is not yet fully understood, despite extensive research on these systems. Here, we perfor…
Antiferromagnetic and bond-order-wave phases in the half-filled two-dimensional optical Su-Schrieffer-Heeger-Hubbard model
Andy Tanjaroon Ly, Benjamin Cohen-Stead, Steven Johnston
Electron-phonon (-ph) interactions arise in many strongly correlated quantum materials from the modulation of the nearest-neighbor hopping integrals, as in the celebrated Su-Sch…
Optimizing the Critical Temperature and Superfluid Density of a Metal-Superconductor Bilayer
Yutan Zhang, Philip M. Dee, Benjamin Cohen-Stead +3
A promising path to realizing higher superconducting transition temperatures is the strategic engineering of artificial heterostructures. For example, quantum materials could…
Persistence of small polarons into the superconducting phase of BaKBiO
Muntaser Naamneh, Eugenio Paris, Daniel McNally +12
Bipolaronic superconductivity is an exotic pairing mechanism proposed for materials like BaKBiO (BKBO); however, conclusive experimental evidence for a (bi)polaron…
Kekulé valence bond order in the honeycomb lattice optical Su-Schrieffer-Heeger Model and its relevance to Graphene
Sohan Malkaruge Costa, Benjamin Cohen-Stead, Steven Johnston
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 inves…
SmoQyDEAC.jl: A differential evolution package for the analytic continuation of imaginary time correlation functions
James Neuhaus, Nathan S. Nichols, Debshikha Banerjee +4
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 (…
Fluctuating charge-density-wave correlations in the three-band Hubbard model
P. Mai, B. Cohen-Stead, T. A. Maier +1
The high-temperature superconducting cuprates host unidirectional spin- and charge-density-wave orders that can intertwine with superconductivity in non-trivial ways. While the cha…
SmoQyDQMC.jl: A flexible implementation of determinant quantum Monte Carlo for Hubbard and electron-phonon interactions (version 2.0 release)
Benjamin Cohen-Stead, Shruti Agarwal, Sohan Malkaruge Costa +6
We introduce version 2.0 of the SmoQyDQMC.jl package, a Julia implementation of the determinant quantum Monte Carlo algorithm. SmoQyDQMC.jl supports generalized tight-binding Hamil…
A comparative study of the superconductivity in the Holstein and optical Su-Schrieffer-Heeger models
Andy Tanjaroon Ly, Benjamin Cohen-Stead, Sohan Malkaruge Costa +1
Theoretical studies suggest that Su-Schrieffer-Heeger-like electron-phonon (-ph) interactions can mediate high-temperature bipolaronic superconductivity that is robust against r…
A comparative determinant quantum Monte Carlo study of the acoustic and optical variants of the Su-Schrieffer-Heeger model
Sohan Malkaruge Costa, Benjamin Cohen-Stead, Andy Tanjaroon Ly +2
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 dis…
Charge correlations suppress unconventional pairing in the Holstein model
Philip M. Dee, Benjamin Cohen-Stead, Steven Johnston +1
In a recent work by Schrodi . [Phys. Rev. B. , L140506 (2021)], the authors find an unconventional superconducting state with a sign-changing order pa…
Charge order in the kagome lattice Holstein model: A hybrid Monte Carlo study
Owen Bradley, Benjamin Cohen-Stead, Steven Johnston +2
The Holstein model is a paradigmatic description of the electron-phonon interaction, in which electrons couple to local dispersionless phonon modes, independent of momentum. The mo…
A flexible class of exact Hubbard-Stratonovich transformations
Seher Karakuzu, Benjamin Cohen-Stead, Cristian D. Batista +2
We consider a class of Hubbard-Stratonovich transformations suitable for treating Hubbard interactions in the context of quantum Monte Carlo simulations. A tunable parameter al…
A hybrid Monte Carlo study of bond-stretching electron-phonon interactions and charge order in BaBiO
Benjamin Cohen-Stead, Kipton Barros, Richard Scalettar +1
The relationship between electron-phonon (-ph) interactions and charge-density-wave (CDW) order in the bismuthate family of high-temperature superconductors remains unresolved.…
Fast and scalable quantum Monte Carlo simulations of electron-phonon models
Benjamin Cohen-Stead, Owen Bradley, Cole Miles +3
We introduce methodologies for highly scalable quantum Monte Carlo simulations of electron-phonon models, and report benchmark results for the Holstein model on the square lattice.…
Dynamical tuning of the chemical potential to achieve a target particle number in grand canonical Monte Carlo simulations
Cole Miles, Benjamin Cohen-Stead, Owen Bradley +3
We present a method to facilitate Monte Carlo simulations in the grand canonical ensemble given a target mean particle number. The method imposes a fictitious dynamics on the chemi…
Quantum Monte Carlo study of an anharmonic Holstein model
G. Paleari, F. Hébert, B. Cohen-Stead +3
We study the effects of anharmonicity on the physics of the Holstein model, which describes the coupling of itinerant fermions and localized quantum phonons, by introducing a quart…
Effect of Strain on Charge Density Wave Order in the Holstein Model
B. Cohen-Stead, N. C. Costa, E. Khatami +1
We investigate charge ordering in the Holstein model in the presence of anisotropic hopping, , as a model of the effect of strain on charge density wave (CDW)…