45 citations · 224 across the 21 of their papers we have counts for
21 papers
From Localized Packets to Plane Waves: A Time-Domain Approach to Transport in Mesoscopic Systems
Andrzej Biborski
Quantum transport in mesoscopic systems is conventionally formulated within the Landauer--Büttiker scattering framework, where steady-state currents emerge from the transmission of…
Impact of spin-orbit coupling and Zeeman interaction on the multiple Andreev reflections subharmonic gap structure in nanoscopic Josephson junctions
D. Kuiri, J. H. Correa, A. Biborski +1
Multiple Andreev reflections in voltage-biased Josephson junctions give rise to the subharmonic gap structure in the conductance, which is widely used to characterize transport pro…
Signatures of superconducting pairing driven by electron-electron interactions in moiré WSe/WSe homobilayer modelled by Hubbard Hamiltonian
Andrzej Biborski, Michał Zegrodnik
Strong evidence of unconventional superconductivity has been very recently reported experimentally in twisted transition metal dichalcogenide bilayer and gathered a significant amo…
Optimal superconductivity in twisted bilayer WSe where the Van Hove singularity crosses half-filling
Michał Zegrodnik, Waseem Akbar, Andrzej Biborski +1
The recent discovery of unconventional superconductivity has pointed to twisted WSe bilayer as a versatile platform for studying the correlated and topological phases of matter…
Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe/WS heterobilayer
Andrzej Biborski, Michał Zegrodnik
We examine the charge and spin properties of an effective single-band model representing a moiré superlattice of the WSe/WS heterobilayer. We focus on the electro…
Topological superconductivity with mixed singlet-triplet pairing in moiré transition-metal-dichalcogenide bilayers
Waseem Akbar, Andrzej Biborski, Louk Rademaker +1
We investigate strong coupling topological superconductivity in twisted moiré bilayer WSe. Our approach is based on an effective - model with displacement-field-dependent…
Variational Monte-Carlo Approach for Hubbard Model Applied to Twisted Bilayer WSe at Half-Filling
Andrzej Biborski, Paweł Wójcik, Michał Zegrodnik
We consider an effective Hubbard model with spin- and direction-dependent complex hoppings , applied to twisted homobilayer WSe using a variational Monte Carlo approach. The…
Honeycomb anti-dot artificial lattice as a prototypical correlated Dirac fermions system
Andrzej Biborski, Michał Zegrodnik, Paweł Wójcik +1
We study theoretically the electronic properties of the artificial quantum dot honeycomb lattice defined in a two-dimensional electron gas, focusing on the possibility of achieving…
Mixed singlet-triplet superconducting state within the moiré -- model as applied to the description of twisted WSe bilayer
M. Zegrodnik, A. Biborski
We analyze an analog of the -- model as applied to the description of a single moiré flat band of twisted WSe bilayer. To take into account the correlation effects ind…
Superconductivity in high- and related strongly correlated systems from variational perspective: Beyond mean field theory
Józef Spałek, Maciej Fidrysiak, Michał Zegrodnik +1
In this review, we single out selected universal features of high- and related systems, which can be compared with experiment. We start with the concept of real-space pairing,…
Correlation induced -wave pairing in quantum dot square lattice
A. Biborski, M. P. Nowak, M. Zegrodnik
We consider an electrostatically induced square lattice of quantum dots and study the role of electron-electron correlations in the resulting electronic features of the system. We…
Superconductivity in the three-band model of cuprates: nodal direction characteristics and influence of intersite interactions
M Zegrodnik, A Biborski, M. Fidrysiak +1
The three-band Emery model is applied to study the selected principal features of the - superconducting phase in the copper-based compounds. The electron-electron correlat…
Superconducting properties of the hole-doped three-band \emph{d-p} model studied with minimal-size real-space \emph{d}-wave pairing operators
A. Biborski, M. Zegrodnik, J. Spalek
The three-band \emph{d-p} model is investigated by means of Variational Monte-Carlo (VMC) method with the BCS-like wave-function supplemented by the Gutzwiller and Jastrow correlat…
Superconductivity and intra-unit-cell electronic nematic phase in the three-band model of cuprates
M. Zegrodnik, A. Biborski, J. Spałek
The intra-unit-cell nematic phase is studied within the three-band Emery model of the cuprates with the use of the approach based on the diagrammatic expansion of the Gutzwiller wa…
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 +1
The - superconductivity is analyzed within the three-band - model with the use of the diagrammatic expansion of the Guztwiller wave function method (DE-GWF). The det…
Atomization of correlated molecular-hydrogen chain: A fully microscopic Variational Monte-Carlo solution
Andrzej Biborski, Andrzej P. Kądzielawa, Józef Spałek
We discuss electronic properties and their evolution for the linear chain of molecules in the presence of a uniform external force acting along the chain. The system is d…
Metallization of solid molecular hydrogen in two dimensions: Mott-Hubbard-type transition
Andrzej Biborski, Andrzej P. Kądzielawa, Józef Spałek
We analyze the pressure-induced metal-insulator transition in a two-dimensional vertical stack of molecules in x-y plane, and show that it represents a striking example of th…
Dot-ring nanostructure: Rigorous analysis of many-electron effects
Andrzej Biborski, Andrzej P. Kądzielawa, Anna Gorczyca-Goraj +3
We discuss the quantum dot-ring nanostructure (DRN) as canonical example of a nanosystem, for which the~interelectronic interactions can be evaluated exactly. The system has been s…
Discontinuous transition of molecular-hydrogen chain to the quasi-atomic state: Exact diagonalization - ab initio approach
Andrzej P. Kądzielawa, Andrzej Biborski, Józef Spałek
We obtain in a direct and rigorous manner a transition from a stable molecular hydrogen single chain to the quasiatomic two-chain state. We devise an original method c…
Combined shared and distributed memory ab-initio computations of molecular-hydrogen systems in the correlated state: process pool solution and two-level parallelism
Andrzej Biborski, Andrzej P. Kądzielawa, Józef Spałek
An efficient computational scheme devised for investigations of ground state properties of the electronically correlated systems is presented. As an example, chain is…
and molecules with an ab initio optimization of wave functions in correlated state: Electron-proton couplings and intermolecular microscopic parameters
Andrzej P. Kądzielawa, Agata Bielas, Marcello Acquarone +3
The hydrogen molecules and are analyzed with electronic correlations taken into account between the electrons exactly. The optimal single-particle Slater orbit…