45 citations · 224 across the 21 of their papers we have counts for
10 papers · 1 filter
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…
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…
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…
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…