A5088934814- Topological Materials and Phenomena
- Graphene research and applications
- 2D Materials and Applications
- Quantum many-body systems
- Quantum and electron transport phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Photorefractive and Nonlinear Optics
- Theoretical and Computational Physics
- Iron-based superconductors research
- Opinion Dynamics and Social Influence
- Speech Recognition and Synthesis
- Acoustic Wave Resonator Technologies
- Organic and Molecular Conductors Research
- Speech and Audio Processing
- Advanced Chemical Physics Studies
- Polish Historical and Cultural Studies
- Machine Learning in Materials Science
- Surface and Thin Film Phenomena
- Carbon Nanotubes in Composites
- Atomic and Subatomic Physics Research
- Organometallic Compounds Synthesis and Characterization
- Lanthanide and Transition Metal Complexes
- Mechanical and Optical Resonators
- Quantum chaos and dynamical systems
- Crystal structures of chemical compounds
Wrocław University of Science and Technology
2017-2025
AGH University of Krakow
2017-2025
École Polytechnique Fédérale de Lausanne
2022-2023
University of Zurich
2019-2020
This work explores a non-Hermitian system displaying reciprocal variant of the skin effect, which is characterized by an extensive anomalous localization all Hamiltonian eigenmodes in one-dimensional geometry. The authors experimentally demonstrate effect passive RLC circuit and suggest alternative implementations optical, acoustic, mechanical, related platforms.
This work addresses the issue of finding all possible corner charge configurations by using Wilson loop topological invariants. The resultant theoretical framework is used to propose Arsenic and Antimony as material candidates that host fractional charges when realized atomically thin layers.
We revisit the fate of skin modes in many-body non-Hermitian fermionic systems. Contrary to single-particle case, ground state cannot exhibit an exponential localization all eigenstates due Pauli exclusion principle. However, asymmetry can still exist density profile, which be quantified using imbalance between two halves system. Using Su-Schrieffer-Heeger (SSH) chain as illustration, we show existence distinct scaling regimes for imbalance. In first one, grows linearly with system size,...
Using the Sierpi\ifmmode \acute{n}\else \'{n}\fi{}ski carpet and gasket, we investigate whether fractal lattices embedded in two-dimensional space can support topological phases when subjected to a homogeneous external magnetic field. To this end, study localization property of eigenstates, Chern number, evolution energy level statistics disorder is introduced. Combining these theoretical tools, identify regions phase diagram both for which systems exhibit properties normally associated with...
We model interactions following the Sachdev-Ye-Kitaev (SYK) framework in disordered graphene flakes up to 300 000 atoms size ($\ensuremath{\sim}100\text{ }\text{ }\mathrm{nm}$ diameter) subjected an out-of-plane magnetic field $B$ of 5--20 Tesla within tight-binding formalism. investigate two sources disorder: (i) irregularities at system boundaries, and (ii) bulk vacancies---for a combination which we find conditions that could be favorable for formation phase with features under realistic...
The interaction between superconductivity and band topology can lead to various unconventional superconducting (SC) states, represents a new frontier in condensed matter physics research. Recently, the transition metal dichalcogenide (TMD) system 2M-WS2 has been identified as Dirac semimetal exhibiting both with highest Tc = 8.5 K among all TMD materials topological surface states single cone. Here we report on muon spin rotation (muSR) density functional theory studies of microscopic SC...
Abstract A novel Sm(III) orotate complex, [NaSm(orotate) 4 (H 2 O) 10 ]·3H O, has been synthesized and its structure determined by single crystal X-ray diffraction vibrational (IR Raman) spectroscopic methods. The title compound crystallizes in the non-centrosymmetric orthorhombic space group Cmc 1 with Z = 4. In structure, one of two independent ligands links Na(I) cations, forming chains. second ligand completes coordination environment ion, resulting layers that are parallel to ab plane....
We study a $q$-voter model with stochastic driving on complete graph $q$ being random variable described by probability density function $P(q)$, instead of constant value. investigate two types $P(q)$: (1) artificial the fixed expected value $\ensuremath{\langle}q\ensuremath{\rangle}$, but changing variance and (2) empirical freely forming groups in informal places. also stochasticity that can be interpreted as different kinds nonconformity (anticonformity or independence) to answer question...
We investigate topological properties of Bi1-xSbx bilayers in the (111) plane using entanglement measures.Electronic structures are studied multi-orbital tight-binding model, with structural stability confirmed through first-principles calculations.Topologically non-trivial nature Bi bilayer is proved by presence spectral flow spectrum.We consider phase transitions driven a composition change x, an applied external electric field pure Bi, and strain Sb.Composition-and strain-induced reveal...
Motivated by the observation of polarization superlattices in twisted multilayers hexagonal boron nitride ($h$-BN), we address possibility using these heterostructures for tailoring properties multilayer graphene means electrostatic proximity effect. By combination first-principles and large-scale tight-binding model calculations coupled via Wannier function approach, demonstrate creating a sequence well-separated flat-band manifolds AB-stacked bilayer at experimentally relevant superlattice...
Recent experiments in twisted bilayer transition-metal dichalcogenides have revealed a variety of strongly correlated phenomena. To theoretically explore their origin, we combine here ab initio calculations with model approaches to describe and study many-body effects WSe$_2$ under pressure. We find that the interlayer distance is key factor for electronic structure, as it tunes relative energetic positions between K $\Gamma$ valleys valence band maximum untwisted bilayer. As result,...
Abstract Recent experiments in twisted bilayer transition-metal dichalcogenides have revealed a variety of strongly correlated phenomena. To theoretically explore their origin, we combine here ab initio calculations with model approaches to describe and study many-body effects WSe 2 under pressure. We find that the interlayer distance is key factor for electronic structure, as it tunes relative energetic positions between K Γ valleys valence band maximum untwisted bilayer. As result,...
We revisit the fate of skin modes in many-body non-Hermitian fermionic systems. Contrary to single-particle case, ground state cannot exhibit an exponential localization all eigenstates due Pauli exclusion principle. However, asymmetry can still exist density profile, which be quantified using imbalance between two halves system. Using Su-Schrieffer-Heeger (SSH) chain as illustration, we show existence distinct scaling regimes for imbalance. In first one, grows linearly with system size,...
We model SYK (Sachdev-Ye-Kitaev) interactions in disordered graphene flakes up to 300 000 atoms ($\sim$100 nm diameter) subjected an out-of-plane magnetic field $B$ of 5-20 Tesla within the tight-binding formalism. investigate two sources disorder: (i) irregularities at system boundaries, and (ii) bulk vacancies, -- for a combination which we find conditions could be favorable formation phase with features under realistic experimental above liquid helium temperature.
Deep learning models have become widely adopted in various domains, but their performance heavily relies on a vast amount of data. Datasets often contain large number irrelevant or redundant samples, which can lead to computational inefficiencies during the training. In this work, we introduce, for first time context audio domain, k-means clustering as method efficient data pruning. K-means provides way group similar samples together, allowing reduction size dataset while preserving its...
We investigate topological phase transitions in Chern insulators within three-band models, focusing on the empty band and lowest populated by spinless fermions. consider Lieb kagome lattices notice driven hopping integral between nearest-neighbors, which leads to change of number from $C=1$ $C=-1$. In single-particle picture, different phases are examined investigating corresponding entanglement spectra evolution entropy. Entanglement reveal spectral flow characteristic topologically...