A5065974941- Topological Materials and Phenomena
- Graphene research and applications
- Rare-earth and actinide compounds
- 2D Materials and Applications
- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Iron-based superconductors research
- Surface and Thin Film Phenomena
- Cancer Genomics and Diagnostics
- Advancements in Battery Materials
- Seismic Imaging and Inversion Techniques
- Advanced Chemical Physics Studies
- Advanced Thermoelectric Materials and Devices
- Phase-change materials and chalcogenides
- Seismic Waves and Analysis
- Ferroptosis and cancer prognosis
- Cancer Immunotherapy and Biomarkers
- Heusler alloys: electronic and magnetic properties
- Chemical and Physical Properties of Materials
- Crystallography and Radiation Phenomena
- Inorganic Chemistry and Materials
- NMR spectroscopy and applications
St Petersburg University
2018-2025
Moscow Institute of Physics and Technology
2023-2025
Repligen (United States)
2024
Donostia International Physics Center
2023
Addgene
2023
Institute of Solid State Chemistry
2019-2020
Peter the Great St. Petersburg Polytechnic University
2020
Ural Branch of the Russian Academy of Sciences
2019-2020
Siberian Federal University
2019
Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT), an experimental theoretical study of changes in the electronic structure (dispersion dependencies) corresponding modification energy band gap at Dirac point (DP) for topological insulator (TI) $$\textrm{Mn}_{1-x} \textrm{Ge}_x \textrm{Bi}_2 \textrm{Te}_4$$ have been carried out with gradual replacement magnetic Mn atoms by non-magnetic Ge when concentration latter was varied from 10% to 75%. It shown...
We investigate single crystals of the trigonal antiferromagnet ${\mathrm{EuZn}}_{2}{\mathrm{P}}_{2}$ ($P\overline{3}m1$) by means electrical transport, magnetization measurements, x-ray magnetic scattering, optical reflectivity, angle-resolved photoemission spectroscopy (ARPES), and ab initio band structure calculations ($\mathrm{DFT}+U$). find that resistivity increases strongly upon cooling can be suppressed in fields several orders magnitude (colossal magnetoresistance effect). Resonant...
Abstract The ability to finely tune the properties of magnetic topological insulators (TIs) is crucial for quantum electronics. We studied solid solutions with a general formula Ge x Mn 1-x Bi 2 Te 4 between two isostructural Z TIs, MnBi and nonmagnetic GeBi invariants 1;000 1;001, respectively. observed linear x-dependent properties, composition-independent pairwise exchange interactions, phase transitions (TPTs) topologically nontrivial phases semimetal state. TPTs are driven purely by...
The mechanism of the peculiar transport properties around magnetic ordering temperature semiconducting antiferromagnetic ${\mathrm{EuCd}}_{2}{\mathrm{P}}_{2}$ is not yet understood. With a huge peak in resistivity observed above N\'eel ${T}_{\mathrm{N}}=10.6\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, it exhibits colossal magnetoresistance effect. Recent reports on observations ferromagnetic contributions ${T}_{\mathrm{N}}$ as well metallic behavior below this have motivated us to perform...
Abstract Renal medullary carcinoma is a rare undifferentiated tumor of the kidney associated with sickle cell trait and characterized by INI1 (SMARCB1) loss. Although metastasis to lungs, lymph nodes, bone commonly reported, distant spread central nervous system almost never occurs. Here we present an unusual case patient renal brain following treatment which included tazemetostat, EZH2 inhibitor. The metastatic lesion harbored morphologic, immunohistochemical, methylation profile supportive...
The antiferromagnetic ordering that MnBi2Te4 shows makes it invariant with respect to the combination of time-reversal and primitive-lattice translation symmetries, giving rise its topologically nontrivial nature a number fundamental phenomena. At same time, possibility control electronic magnetic properties this system can provide new effective ways for application in devices. One approaches manipulate is partial substitution atoms compound non-magnetic elements, which inevitably affect...
The discovery of a square magnetic-skyrmion lattice in GdRu2Si2, with the smallest so far found skyrmion size and without geometrically frustrated lattice, has attracted significant attention. In this work, we present comprehensive study surface bulk electronic structures GdRu2Si2 by utilizing momentum-resolved photoemission (ARPES) measurements first-principles calculations. We show how structure evolves during antiferromagnetic transition when peculiar helical order 4f magnetic moments...
One of the approaches to manipulate MnBi2Te4 properties is magnetic dilution, which inevitably affects interplay magnetism and band topology in system. In this work, we carried out angle-resolved photoemission spectroscopy (ARPES) measurements density functional theory (DFT) calculations for analysing changes electronic structure Mn1-xGexBi2Te4 that occur under parameter x variation. We consider two ways Mn/Ge substitution: (i) bulk doping whole system; (ii) surface first septuple layer. For...
The electronic and spin structure of topological surface states in antiferromagnetic insulators MnBi 4 Te 7 6 10 consisting a sequence magnetic 2 septuple layers separated by nonmagnetic Bi 3 quintuple has been calculated within the density functional theory. Features characteristic systems with different terminations (both layers) have analyzed theoretical calculations compared measured dispersions states. It shown that band gap about 35–45 meV, as , opens at Dirac point case terminated...
We show that graphene can be magnetized by coupling to a ferromagnetic Co film through Au monolayer. The presence of dislocation loops under leads ferrimagnetic ordering moments in the two C sublattices. It is shown band gap ∼80 meV K[over ¯] point has magnetic nature and exists for ordering. Interplay between Rashba exchange couplings evidenced spin splitting asymmetry spin-ARPES measurements fully supported DFT calculation (9×9) unit cell. Owing sign-opposite Berry curvatures ¯]^{'}...
Spin injectors based on an insulating hexagonal boron nitride ($h$-BN) film and a ferromagnetic Co surface remain promising for spintronic applications. However, sharp well-defined interface is required high performance. Here, the authors explore structural electronic properties of $h$-BN monolayer epitaxially grown single-crystalline cobalt surface. They give comprehensive description structure uncover peculiarities interaction between atoms at interface.
Modification of the electronic and crystal structure zero-layer graphene grown on $6H$-SiC(0001) after Co intercalation is reported. Using a wide range techniques including angle-resolved photoelectron spectroscopy, x-ray Raman low-energy electron diffraction, we found that SiC transforms into monolayer as result cobalt intercalation. The Dirac cone $\ensuremath{\pi}$ band characteristic quasi-freestanding observed. In combination with high-resolution transmission microscopy atomic force...
Abstract New temperature scales and remarkable differences from bulk properties have increasingly placed the surfaces of strongly correlated f materials into focus research activities. Applying first‐principles calculations angle‐resolved photoelectron spectroscopy measurements, a strong Rashba effect spin‐split surface states at CeIn heavy‐fermion superconductor CeIrIn 5 are revealed. The unveiled 4 ‐derived electron landscape is remarkably distinct for Ce implying existence novel near...
Band structure and topology of magneto-spin–orbit graphene is investigated using the proposed tight-binding model that incorporates both Rashba sublattice-resolved collinear exchange couplings in a generic ferrimagnetic (FIM) setting for in-plane out-of-plane magnetization directions. The resulting band structures were analyzed possibilities to extract strengths from experimental spin-resolved ARPES measurements valley gaps π-state spin-splittings. It was shown topologically trivial FIM...
Abstract This work aims to study the conditions of topological phase transition (TPT) between and trivial states in antiferromagnetic insulator (AFM TI) MnBi $$_2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow/> <mml:mn>2</mml:mn> </mml:msub> </mml:math> Te $$_4$$ <mml:mn>4</mml:mn> propose some theory about relationship this TPT with possibility axion-like state realization material. Using density functional approach we have analyzed changes electronic spin...
We present and discuss the methodology for modeling $4f$ photoemission spectra, photoelectron diffraction (PED) patterns, magnetic dichroism effects rare-earth-based materials. Using PED in photoemission, we explore electronic properties of near-surface region valence-fluctuating material ${\mathrm{EuIr}}_{2}{\mathrm{Si}}_{2}$. For Eu-terminated surface, found that topmost Eu layer is divalent exhibits a ferromagnetic order below 10 K. The valency next layer, fifth atomic about 2.8 at low...
A magnetic field modifies optical properties and provides valley splitting in a molybdenum disulfide (MoS2) monolayer. Here we demonstrate scalable approach to the epitaxial synthesis of MoS2 monolayer on graphene/Co system. Using spin- angle-resolved photoemission spectroscopy observe proximity effect that causes 20 meV spin-splitting at Γ̅ point canting spins K̅ valence band toward in-plane direction cobalt magnetization. Our density functional theory calculations reveal spin component is...
Acinar cell carcinoma (ACC) accounts for about 1% of pancreatic cancers. The molecular and clinical features ACC are less characterized than ductal adenocarcinoma. We retrospectively evaluated the patients who underwent germline and/or somatic testing at University Texas MD Anderson Cancer Center from 2008 to 2022. Patient information was extracted our institutional database with approval Institutional Review Board. identified 16 available results. Fourteen had metastatic disease, 1...
In-plane heterostructures of hexagonal boron nitride (h-BN) and graphene (Gr) have recently appeared in the focus material science research owing to their intriguing tunable electronic properties. However, disclosure atomic structure properties one-dimensional heterojunctions between Gr h-BN domains remains a largely unexplored challenging task. Here, we report an approach obtain perfectly oriented atomically thin hybrid h-BN–Gr heterolayer on Co(0001) surface. A perfect matching lattice...