A5062449000- Rare-earth and actinide compounds
- Iron-based superconductors research
- Topological Materials and Phenomena
- 2D Materials and Applications
- Organic and Molecular Conductors Research
- Inorganic Chemistry and Materials
- Advanced Condensed Matter Physics
- High-pressure geophysics and materials
- Magnetic and transport properties of perovskites and related materials
- Mineralogy and Gemology Studies
- Graphene research and applications
- Advanced Thermoelectric Materials and Devices
- X-ray Diffraction in Crystallography
- Theoretical and Computational Physics
- Geological and Geochemical Analysis
- Surface Roughness and Optical Measurements
- Magnetic properties of thin films
- Catalysis and Oxidation Reactions
- Shape Memory Alloy Transformations
- Phase-change materials and chalcogenides
- Magnetic Properties of Alloys
- Advancements in Semiconductor Devices and Circuit Design
- Intellectual Capital and Performance Analysis
- Heusler alloys: electronic and magnetic properties
- Electronic and Structural Properties of Oxides
Czech Academy of Sciences, Institute of Physics
2023-2024
Czech Academy of Sciences
2023-2024
University of Alabama at Birmingham
2021-2022
Bhabha Atomic Research Centre
2016-2020
Homi Bhabha National Institute
2018-2020
We report the structural, vibrational and electrical transport properties up to 16 GPa of 1T-TiTe2, a prominent layered 2D system, which is predicted show series topologically trivial - nontrivial transitions under hydrostatic compression. clearly signatures two iso-structural transition at 2 4 obtained from minima in c/a ratio concomitant with phonon linewidth anomalies Eg A1g modes around same pressures, providing strong indication unusual electron-phonon coupling associated these...
We report pressure evolution of charge density wave (CDW) order and the emergence superconductivity (SC) in $1\mathit{T}\text{\ensuremath{-}}{\mathrm{VSe}}_{2}$ single crystal by studying resistance magnetoresistance behavior under high pressure. With increasing quasihydrostatic CDW enhances with its ordering temperature ($\ensuremath{\sim}100\phantom{\rule{4pt}{0ex}}\mathrm{K}$ at ambient P) marginally up to 5 GPa. At higher pressures, CDW-like anomaly increases more rapidly characteristic...
Pristine $1\mathit{T}\ensuremath{-}{\mathrm{TiTe}}_{2}$ single crystal has been studied for resistance and magnetoresistance behavior under quasihydrostatic nonhydrostatic compressions. While the semimetallic state is retained in nearly hydrostatic pressures, small compression leads to an abrupt change low-temperature resistance, a signature of possible charge density wave (CDW) ordering, that eventually collapses above 6.2 GPa. Superconductivity emerges at $\ensuremath{\sim}5$ GPa, rapidly...
A thorough study of ${\mathrm{EuZn}}_{2}{\mathrm{P}}_{2}$ single crystals, which were grown from Sn flux, was performed using both bulk (heat capacity, ac susceptibility, dc magnetization, electrical resistivitivity, magnetoresistance) and microscopic (M\"ossbauer spectroscopy) techniques. Electrical resistance magnetic susceptibility measured also under high pressure conditions (up to 19 9.5 GPa, respectively). Further insight into electronic properties phonons is provided by ab initio...
Abstract High pressure is an effective tool to induce exotic quantum phenomena in magnetic topological insulators by controlling the interplay of order and state. This work presents a comprehensive high-pressure study crystal structure ground state up 62 GPa intrinsic magnet EuSn 2 P . With combination high resolution X-ray diffraction, 151 Eu synchrotron Mössbauer spectroscopy, absorption molecular orbital calculations, electronic band it has been revealed that drives from rhombohedral...
External pressure suppresses the ferromagnetism of localized Cr 3d electron moments in van der Waals insulator CrBr3, which cannot be explained without considering a dramatic pressure-induced crystal or electronic structure change. We addressed this issue by conducting parallel experimental investigation single crystals magnetic and structural properties using magnetization, X-ray diffraction, Raman spectroscopy measurements. Ab initio DFT calculations atomistic simulations...
We report the effect of strong spin orbit coupling inducing electronic topological and semiconductor to metal transitions on thermoelectric material AgBiSe2 at high pressures. The synchrotron X-ray diffraction Raman scattering measurement provide evidence for a pressure induced structural transition from hexagonal (α-AgBiSe2) rhombohedral (β-AgBiSe2) relatively very low around 0.7 GPa. sudden drop in electrical resistivity clear anomalous changes line width A1g Eg(1) modes 2.8 GPa was...
Layered semimetallic $1\mathit{T}\ensuremath{-}{\mathrm{TiTe}}_{2}$ has been reported to exhibit pressure-induced superconductivity, and some nontrivial topological states have also suggested appear under pressure. Here we investigate the optical properties of this compound by infrared reflectance measurements over a broad energy range quasihydrostatic pressures up 22 GPa. The observed conspicuous changes phonon spectra, in combination with x-ray diffraction data, provide clear evidence an...
To establish the microscopic P-T phase diagram of recent 112-type iron-pnictides $\mathrm{Eu}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}){\mathrm{As}}_{2}$ (x = 0, 0.04), high-pressure synchrotron M\"ossbauer spectroscopy experiments in $^{151}\mathrm{Eu}$ and $^{57}\mathrm{Fe}$ have been performed. In ${\mathrm{EuFeAs}}_{2}$ application pressure completely suppresses itinerant electron magnetism from Fe sublattice local-moment Eu ions at...
We present ambient and high-pressure electrical transport structural properties of recently discovered magnetic Weyl semimetal PrAlGe. Electrical resistivity at pressure shows an anomaly $T_C$ = 15.1 K related to the ferromagnetic transition. Anomalous Hall effect (AHE) is observed below $T_C$. observe a 1.4 K/GPa increase with pressure, resulting in $\approx$ 47 23.0 GPa. Strong competition between Lorentz force spin-scattering mechanisms suppressed by field deduced from magnetoresistance...
Structural and magnetic properties of the Shastry-Sutherland material Yb2Pt2Pb were studied in single-crystalline form under pressures up to 10 GPa, fields 17 T, temperatures down 0.3 K. Surprisingly robust order is observed with Néel temperature TN = 2.1 K stable 8.1 GPa. Indication an additional phase formation can be traced resistivity data for field along c-axis exceeding (pressure-dependent) metamagnetic transition. The related anomaly shifts higher increasing field, merging at...
We present here high pressure structural and vibrational investigation of a ternary compound Cu3VS4 by means synchrotron based powder X-ray diffraction Raman spectroscopy. At ambient conditions it crystallizes in cubic symmetry (P 4¯ 3m). Although the lattice remains stable up to about 9 GPa, profile spectra suggest that V2+ cation exist two different crystallographic sites (Wyckoff sites: 1a, as mineral sulvanite, 1b). Above 5 emergence broad quasi elastic scattering indicates system...
The Ni2.01Mn1.58Sn0.41 alloy is a member of the Heusler material family which undergoes diffusionless structural transition from cubic austenite to orthorhombic martensite during its cooling. was observed at temperature 398 K paramagnetic with complex magnetic structure. measurement AC susceptibility confirmed spin-glass state temperatures below 155 and frequency dependence cups in susceptibility, presence clusters (11 nm3 size) strong interaction deduced. shows anomalous Hall effect (AHE)...
We report high pressure XRD and magnetization measurements of a newly discovered novel 112-type iron-based superconducting compound Ca1-xEuxFeAs2. No structural phase transition occurs up to 10 GPa, the highest this study. From measurement we observe that volume fraction decreases upon increasing but no specific changes temperature (Tc) was detected.