98 citations · 568 across the 37 of their papers we have counts for
37 papers
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…
Electrical spin manipulation in double SrTiO/LaAlO quantum dots
B. Szafran, M. Zegrodnik, M. P. Nowak +2
The spin dynamics in two electron double quantum dots embedded in two dimensional electron gas at the interface between SrTiO and LaAlO is studied by an exact numerical sol…
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…
Electric dipole spin resonance in single and two electron quantum dot defined in two-dimensional electron gas at the SrTiO/LaAlO interface
B. Szafran, M. Zegrodnik. M. P. Nowak, R. Citro +1
We investigate the energy spectrum of a single and two electron quantum dot (QD) embedded in two dimensional electron gas at the interface between SrTiO and LaAlO, in the p…
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…
Interplay between the extended s-wave symmetry of the gap and the spin-orbit coupling in the low-electron concentration regime of quasi-two-dimensional superconductors
M. Zegrodnik, P. Wójcik
We analyze the real-space paired state with the -dependent superconducting gap in the presence of Rashba type spin-orbit coupling and external magnetic field. We show t…
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…
Impact of the spin-orbit interaction on the phase diagram and anisotropy of the in-plane critical magnetic field in superconducting LaAlO/SrTiO interface
P. Wójcik, M. P. Nowak, M. Zegrodnik
The two-dimensional electron gas at the interface between LaAlO and SrTiO (LAO/STO) exhibits gate tunable superconductivity with a characteristic dome-like shape of the cri…
Superconducting dome with - pairing symmetry in the heavily hole-overdoped copper-oxide planes
M. Zegrodnik, P. Wójcik, J. Spałek
We analyze the two-orbital (with and orbitals) analogue of the -- model as applied to the description of the copper-oxide monolayer deposited…
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…
Superconducting dome in the LaAlO/SrTiO interfaces as a direct effect of the extended s-wave symmetry of the gap
M. Zegrodnik, P. Wójcik
The two-dimensional electron gas (2DEG) at the LaAlO/SrTiO interface exhibits gate tunable superconductivity with a domelike shape of as a function of electron…
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…
Superconducting dome in doped 2D superconductors with broken inversion symmetry
P. Wójcik, M. P. Nowak, M. Zegrodnik
We analyze an unconventional inter-subband paired phase in a 2D doped superconductor considering both systems with the inversion symmetry and with the inversion symmetry broken. We…
Intersubband pairing induced Fulde-Ferrell phase in metallic nanofilms
P. Wójcik, M. P. Nowak, M. Zegrodnik
We consider a free-standing metallic nanofilm with a predominant intersubband paring which emerges as a result of the confinement in the growth direction. We show that the Fermi 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…
Realistic estimates of superconducting properties for the cuprates: reciprocal-space diagrammatic expansion combined with variational approach
M. Fidrysiak, M. Zegrodnik, J. Spałek
We propose a systematic approach to the systems of correlated electrons, the so-called -DE-GWF method, based on reciprocal-space (-resolved) diagrammatic ex…
Incorporation of charge- and pair-density-wave states into the one-band model of d-wave superconductivity
M. Zegrodnik, J. Spałek
We study the coexistence of pair- (PDW) and charge-density-wave (CDW) states within the single-band -- and Hubbard models of - superconductivity and discuss our r…
Unconventional topological superconductivity and phase diagram for an effective two-orbital model as applied to twisted bilayer graphene
Maciej Fidrysiak, Michał Zegrodnik, Józef Spałek
We consider the superconducting and Mott-insulating states for the twisted bilayer graphene, modeled as two narrow-band system of electrons with appreciable intraatomic Coulomb int…
Stability of the coexistent superconducting-nematic phase under the presence of intersite interactions
Michał Zegrodnik, Józef Spałek
We analyze the effect of intersite-interaction terms on the stability of the coexisting superconucting-nematic phase (SC+N) within the extended Hubbard and -- models on th…
Universal properties of high-temperature superconductors from real-space pairing III: The role of correlated hopping and intersite Coulomb interaction within the t-J-U model
Michał Zegrodnik, Józef Spałek
We study the effect of the correlated hopping term and the intersite Coulomb interaction term on principal features of the - superconducting (SC) state, in both the electr…