[HTML][HTML] Superconductivity in high-Tc and related strongly correlated systems from variational perspective: Beyond mean field theory

J Spałek, M Fidrysiak, M Zegrodnik, A Biborski - Physics Reports, 2022 - Elsevier
The principal purpose of this topical review is to single out some of the universal features of
high-temperature (high-T c) and related strongly-correlated systems, which can be …

Unconventional topological superconductivity and phase diagram for an effective two-orbital model as applied to twisted bilayer graphene

M Fidrysiak, M Zegrodnik, J Spałek - Physical Review B, 2018 - APS
We consider the superconducting and Mott-insulating states for twisted bilayer graphene,
modeled as a two-narrow-band system of electrons with appreciable intra-atomic Coulomb …

Mixed singlet-triplet superconducting state within the moiré model applied to twisted bilayer

M Zegrodnik, A Biborski - Physical Review B, 2023 - APS
We analyze an analog of the tJU model as applied to the description of a single moiré flat
band of twisted WSe 2 bilayer. To take into account the correlation effects induced by a …

Tuning topological superconductivity within the model of twisted bilayer cuprates

M Fidrysiak, B Rzeszotarski, J Spałek - Physical Review B, 2023 - APS
We carry out a theoretical study of unconventional superconductivity in twisted bilayer
cuprates (TBCs) as a function of electron density and layer twist angle. The bilayer tJU …

Antiferromagnetism, charge density wave, and d-wave superconductivity in the extended tJU model: role of intersite Coulomb interaction and a critical overview of …

M Abram, M Zegrodnik, J Spałek - Journal of Physics: Condensed …, 2017 - iopscience.iop.org
In the first part of the paper, we study the stability of antiferromagnetic (AF), charge density
wave (CDW), and superconducting (SC) states within the tJUV model of strongly correlated …

[HTML][HTML] Ubiquitous light real-space pairing from long-range hopping and interactions

GD Adebanjo, JP Hague, PE Kornilovitch - Physics Letters A, 2024 - Elsevier
We systematically examine how long-range hopping and its synergy with extended
interactions leads to light bound pairs. Pair properties are determined for a dilute extended …

Unified theory of spin and charge excitations in high- cuprate superconductors: A quantitative comparison with experiment and interpretation

M Fidrysiak, J Spałek - Physical Review B, 2021 - APS
We provide a unified interpretation of both paramagnon and plasmon modes in high-T c
copper-oxides, and verify it quantitatively against available resonant inelastic x-ray …

Superconductivity in the three-band model of cuprates: Variational wave function study and relation to the single-band case

M Zegrodnik, A Biborski, M Fidrysiak, J Spałek - Physical Review B, 2019 - APS
The d-wave superconductivity (SC) is analyzed within the three-band dp model with the use
of the diagrammatic expansion of the Gutzwiller wave function method (DE-GWF). The …

Universal properties of high-temperature superconductors from real-space pairing: Role of correlated hopping and intersite Coulomb interaction within the  …

M Zegrodnik, J Spałek - Physical Review B, 2017 - APS
We study the effect of the correlated hopping term and the intersite Coulomb interaction term
on principal features of the d-wave superconducting (SC) state, in both the electron-and hole …

Effect of interlayer processes on the superconducting state within the model: Full Gutzwiller wave-function solution and relation to experiment

M Zegrodnik, J Spałek - Physical Review B, 2017 - APS
The Gutzwiller wave-function solution of the tJU model is considered for the bilayer high-TC
superconductor by using the so-called diagrammatic expansion method. The focus is on the …