A5050033023- Physics of Superconductivity and Magnetism
- Rare-earth and actinide compounds
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Iron-based superconductors research
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- High-pressure geophysics and materials
- Heusler alloys: electronic and magnetic properties
- Semiconductor materials and interfaces
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Surface and Thin Film Phenomena
- Molecular Junctions and Nanostructures
- Advanced Condensed Matter Physics
Tata Institute of Fundamental Research
2022-2024
The search for ideal quantum materials with symmetry-protected topological states continues to intrigue intense research activities in condensed matter physics. Here, we present single crystal growth, Fermi surface studies, and state analysis of a binary boride ${\mathrm{YB}}_{2}$ that crystallizes the hexagonal structure space group $P6/mmm$ lattice constants $a=3.304(2)$ \AA{}, $c=3.846(5)$ \AA{}. was grown by Czochralski method, tetra-arc furnace. anisotropic physical properties are...
A single crystal of NbReSi which crystallizes in the hexagonal structure with noncentrosymmetric space group $P\overline{6}2m$ (No. 189) has been grown by Czochralski method using a tetra-arc furnace. The anisotropic physical properties have studied measuring magnetic susceptibility and electrical transport. superconducting transition temperature $({T}_{\mathrm{c}})$ is around 6.1 K, measured upper critical field $({H}_{\mathrm{c}2})$ values are 8.39 T 11.65 for applied parallel to [0001]...
The authors have experimentally observed both charge-density-wave and quantum Hall effect in bulk CaCu${}_{4}$\penalty1000\-\allowhyphens{}As${}_{2}$, where two-dimensional parallel conduction channels play an important role transport properties.
Single crystals of ${\mathrm{Ce}}_{2}{\mathrm{Re}}_{3}{\mathrm{Si}}_{5}$ and ${\mathrm{Pr}}_{2}{\mathrm{Re}}_{3}{\mathrm{Si}}_{5}$ have been grown by the Czochralski method in a tetra-arc furnace. Powder x-ray diffraction confirmed that these compounds crystallize ${\mathrm{U}}_{2}{\mathrm{Mn}}_{3}{\mathrm{Si}}_{5}$-type tetragonal crystal structure with space group $P4/mnc$ (no. 128). The anisotropic physical properties studied comprehensively measuring magnetic susceptibility, isothermal...
Anisotropic transport, Shubnikov-de Haas (SdH), and de Haas-van Alphen (dHvA) quantum oscillations studies are reported on a high-quality CoSi single crystal grown by the Czochralski method. Temperature-dependent resistivities indicate dominating electron-electron scattering. Magnetoresistance (MR) at 2 K reaches 610% for I||[111] B||[01-1], whereas it is 500% I||[01-1] B||[111]. A negative slope in field-dependent Hall resistivity suggests electrons majority carriers. The carrier...
The recent studies on the anomalous Hall effect (AHE) have revealed an intrinsic relationship between topological band structure and experimentally observed transverse conductivity. Consequently, this has led to a heightened focus examining aspects of AHE. Here, in-depth study temperature driven sign reversal conductivity in single crystalline MnPtGa (space group: $P{6}_{3}/mmc$) been presented. From interdependence linear resistivity, origin AHE is confirmed be type. By systematically...
Single crystal of the binary equiatomic compound GdBi crystallizing in rock-salt-type cubic structure with space group $Fm\overline{3}m$ has been grown by flux method. The electrical and magnetic measurements have performed on well-oriented single crystals. antiferromagnetic ordering Gd moments is confirmed at ${T}_{\mathrm{N}}=27.5$ K. magnetization measurement 2 K along principal crystallographic direction [100] attained a value $1.3\phantom{\rule{0.16em}{0ex}}{\textmu{}}_{B}$/Gd field 7...
Single crystal of binary compound crystallizing in the space group Fm3̅m has been grown by flux method. The crystals are high quality with residual resistivity ratio value 80. Magnetic and electrical transport studies have performed on well oriented single crystal. Antiferromagnetic ordering is observed this at 27.5 K. Another magnetic transition may occur sub-2K temperature indicated increasing behavior susceptibility. Zero field shows normal metal-like above temperature. Low resistivity,...
The topological Hall effect is often observed in materials that host the skyrmion lattice. Here, authors present a comprehensive study of magnetic phases GdNi${}_{0.4}$Si${}_{1.6}$ single crystal, which crystallizes centrosymmetric hexagonal crystal structure with space group $P6/m\phantom{\rule{0}{0ex}}m\phantom{\rule{0}{0ex}}m$. data reveals signature effect. A phase diagram constructed from and transport studies highlights several phases, where skyrmionic sandwiched between these narrow...
We report on the magnetic, electrical transport, and thermal properties of ${\mathrm{Ho}}_{2}{\mathrm{Re}}_{3}{\mathrm{Si}}_{5}$ single crystal by means magnetization, resistivity, heat capacity measurements in temperature range 2--300 K. Magnetic susceptibility, capacity, resistivity reveal two closely spaced antiferromagnetic transitions at ${T}_{\mathrm{N}1}\ensuremath{\sim}$ 3.8 K ${T}_{\mathrm{N}2}\ensuremath{\sim}$ 4.2 Three field-induced metamagnetic 4.5, 10, 15 kOe, magnetically...
Chalcopyrite compounds are extensively explored for their exotic topological phases and associated phenomena in a variety of experiments. Here, we discuss the electrical transport properties direct energy gap semiconductor CdGeAs2. The observed transverse magnetoresistance (MR) is found to be around 136% at temperature 1.8 K magnetic field 14 T, following semiclassical exponent MR ∼ B2.18. analysis exhibits violation Kohler rule, suggesting involvement multiple carriers system. Below 15 K,...
Chalcopyrite compounds are extensively explored for their exotic topological phases and associated phenomena in a variety of experiments. Here, we discuss the electrical transport properties direct energy gap semiconductor CdGeAs$_{2}$. The observed transverse magnetoresistance (MR) is found to be around 136% at temperature 1.8 K magnetic field 14 T, following semiclassical exponent MR $\sim$ $B^{2.18}$. analysis exhibits violation Kohler rule, suggesting involvement multiple carriers...
Single crystal of the binary equi-atomic compound GdBi crystallizing in rock salt type cubic structure with space group $Fm\bar{3}m$ has been grown by flux method. The electrical and magnetic measurements have performed on well oriented single crystals. antiferromagnetic ordering Gd moments is confirmed at $T_{\rm N} = 27.5$~K. magnetization measurement $2$~K along principal crystallographic direction [100] did not show any metamagnetic transition no sign saturation up to $7$~T. Zero field...