Andrzej Biborski
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View article: Signatures of superconducting pairing driven by electron-electron interactions in moiré <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>WSe</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>/</mml:mo> <mml:msub> <mml:mi>WSe</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:math> homobilayer modeled by Hubbard Hamiltonian
Signatures of superconducting pairing driven by electron-electron interactions in moiré homobilayer modeled by Hubbard Hamiltonian Open
Strong evidence of unconventional superconductivity has been very recently reported experimentally in twisted transition metal dichalcogenide bilayer and gathered a significant amount of interest. Here we consider the Hubbard model on a tr…
View article: Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe$_2$/WS$_2$ heterobilayer
Charge and spin properties of a generalized Wigner crystal realized in the moiré WSe$_2$/WS$_2$ heterobilayer Open
We examine the charge and spin properties of an effective single-band model representing a moiré superlattice of the WSe$_{2}$/WS$_{2}$ heterobilayer. We focus on the $2/3$ electron filling, which refers to the formation of a generalized W…
View article: Topological superconductivity with mixed singlet-triplet pairing in moiré transition-metal-dichalcogenide bilayers
Topological superconductivity with mixed singlet-triplet pairing in moiré transition-metal-dichalcogenide bilayers Open
We investigate strong coupling topological superconductivity in twisted moiré bilayer WSe$_2$. Our approach is based on an effective $t$-$J$ model with displacement-field-dependent complex hoppings, which is treated with the variational Gu…
View article: Variational Monte-Carlo Approach for Hubbard Model Applied to Twisted Bilayer WSe$_2$ at Half-Filling
Variational Monte-Carlo Approach for Hubbard Model Applied to Twisted Bilayer WSe$_2$ at Half-Filling Open
We consider an effective Hubbard model with spin- and direction-dependent complex hoppings $t$, applied to twisted homobilayer WSe$_2$ using a variational Monte Carlo approach. The electronic correlations are taken into account by applying…
View article: Dataset and figure generator for Variational Monte Carlo approach applied to the model describing WSe2 homo-bilayer
Dataset and figure generator for Variational Monte Carlo approach applied to the model describing WSe2 homo-bilayer Open
This data set contains post-processed data obtained from variational Monte-Carlo approach for Hubbard model with complex, spin and direction dependent phase. This model is believed to properly describe the eseential features of WSe2 twiste…
View article: Dataset and figure generator for Variational Monte Carlo approach applied to the model describing WSe2 homo-bilayer
Dataset and figure generator for Variational Monte Carlo approach applied to the model describing WSe2 homo-bilayer Open
This data set contains post-processed data obtained from variational Monte-Carlo approach for Hubbard model with complex, spin and direction dependent phase. This model is believed to properly describe the eseential features of WSe2 twiste…
View article: Honeycomb anti-dot artificial lattice as a prototypical correlated Dirac fermions system
Honeycomb anti-dot artificial lattice as a prototypical correlated Dirac fermions system Open
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 a regime in which electronic correlations play a dominant …
View article: Mixed singlet-triplet superconducting state within the moiré $t$-$J$-$U$ model as applied to the description of twisted WSe$_2$ bilayer
Mixed singlet-triplet superconducting state within the moiré $t$-$J$-$U$ model as applied to the description of twisted WSe$_2$ bilayer Open
We analyze an analog of the $t$-$J$-$U$ 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 significant strength of the Coulomb repulsion, we…
View article: Correlation induced $d$-wave pairing in quantum dot square lattice
Correlation induced $d$-wave pairing in quantum dot square lattice Open
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 utilize the Wannier functions methodology in order to const…
View article: Hole doped three-band \emph{d-p} model: Superconducting properties in view of minimal-size real-space $d$-wave pairing operators by means of Variational Monte-Carlo method
Hole doped three-band \emph{d-p} model: Superconducting properties in view of minimal-size real-space $d$-wave pairing operators by means of Variational Monte-Carlo method Open
The three-band \emph{d-p} model is investigated by means of Variational Monte-Carlo method with the BCS-like wave-function supplemented with the Gutzwiller and Jastrow correlators. Optimization by means of Variational Monte-Carlo approach …
View article: Superconductivity in the three-band model of cuprates: Variational wave function study and relation to the single-band case
Superconductivity in the three-band model of cuprates: Variational wave function study and relation to the single-band case Open
The $d$-$wave$ superconductivity is analyzed within the three-band $d$-$p$\nmodel with the use of the diagrammatic expansion of the Guztwiller wave\nfunction method (DE-GWF). The determined stability regime of the\nsuperconducting state ap…
View article: Atomization of correlated molecular-hydrogen chain: A fully microscopic variational Monte Carlo solution
Atomization of correlated molecular-hydrogen chain: A fully microscopic variational Monte Carlo solution Open
We discuss electronic properties and their evolution for the linear chain of\n$H_2$ molecules in the presence of a uniform external force $f$ acting along\nthe chain. The system is described by an extended Hubbard model within a fully\nmic…
View article: Metallization of solid molecular hydrogen in two dimensions: Mott-Hubbard-type transition
Metallization of solid molecular hydrogen in two dimensions: Mott-Hubbard-type transition Open
We analyze the pressure-induced metal-insulator transition in a\ntwo-dimensional vertical stack of $H_2$ molecules in x-y plane, and show that\nit represents a striking example of the Mott-Hubbard-type transition. Our\ncombined exact diago…
View article: Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds I: analytical approach
Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds I: analytical approach Open
The general state of knowledge of diffusion and order-order relaxation in a long-range ordered system is summarised. A consistent atomistic description of self-diffusion and the order-order relaxation process is discussed in terms of effec…
View article: Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds II: Monte Carlo simulation of B2-ordering binaries
Atomistic origin of the thermodynamic activation energy for self-diffusion and order-order relaxation in intermetallic compounds II: Monte Carlo simulation of B2-ordering binaries Open
The validity of previously derived formulae expressing the activation energies for self-diffusion and ‘order–order’ relaxations in intermetallics in terms of the activation energies of more elementary processes involved in the phenomena is…