V.H. Tran
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View article: Van der Waals injection-molded crystals
Van der Waals injection-molded crystals Open
Shaping low-dimensional crystals into precise geometries with low disorder is an outstanding challenge. Here, we present a method to grow single crystals of arbitrary geometry within van der Waals (vdW) materials. By injecting molten mater…
View article: First-principles study on structural, magnetic and electronic properties of EuFe2–<i>x</i>Ni<i>x</i>As2 solid solutions
First-principles study on structural, magnetic and electronic properties of EuFe2–<i>x</i>Ni<i>x</i>As2 solid solutions Open
The magnetic ground state and electronic structure properties of solid solutions EuFe2–xNixAs2 (x = 0, 0.08, 0.12, 0.20, 0.40, 2.0) are investigated using the full-potential linearized augmented-plane wave method. The results show that Ni …
View article: Wrist Exoskeleton Device with a Novel Cable Drive Solution
Wrist Exoskeleton Device with a Novel Cable Drive Solution Open
This paper presents the design of a lower limb exoskeleton made for the purpose of wrist joint rehabilitation. The authors use the exoskeleton structure in order to cope with the user’s upper-limb kinematics and to provide motion to the wr…
View article: g-mode Oscillations in Neutron Stars with Hyperons
g-mode Oscillations in Neutron Stars with Hyperons Open
A common alternative to the standard assumption of nucleonic composition of matter in the interior of a neutron star is to include strange baryons, particularly hyperons. Any change in composition of the neutron star core has an effect on …
View article: Electronic transport mechanisms in a thin crystal of the Kitaev candidate $α$-RuCl$_3$ probed through guarded high impedance measurements
Electronic transport mechanisms in a thin crystal of the Kitaev candidate $α$-RuCl$_3$ probed through guarded high impedance measurements Open
$α$-RuCl$_3$ is considered to be the top candidate material for the experimental realization of the celebrated Kitaev model. It is however known that additional interactions beyond the Kitaev model trigger in $α$-RuCl$_3$, a long-range zig…
View article: Temperature Effects on Core g-Modes of Neutron Stars
Temperature Effects on Core g-Modes of Neutron Stars Open
Neutron stars provide a unique physical laboratory in which to study the properties of matter at high density and temperature. We study a diagnostic of the composition of high-density matter, namely, g-mode oscillations, which are driven b…
View article: The density functional theory study of substitution effect in antiferromagnetic USn05Sb15
The density functional theory study of substitution effect in antiferromagnetic USn05Sb15 Open
The electronic structure of antiferromagnetic (AF) USn0.5Sb1.5 crystallizing in the tetragonal Cu2Sb-type structure is investigated by means of ab-initio calculations using the full-potential linearized augmented plane wave method (FP-LAPW…
View article: Symptomatic colonic lipoma: Report of two cases in Binh Dan Hospital
Symptomatic colonic lipoma: Report of two cases in Binh Dan Hospital Open
Colonic lipomas are benign tumors resulting from the proliferation of mature fat cells. Gastrointestinal lipomas are rare, often asymptomatic, and most are detected through diagnostic imaging devices such as colonoscopy and abdominal-pelvi…
View article: <i>Ab initio</i> investigation of electronic structure and optical properties of IrSn<sub>4</sub>
<i>Ab initio</i> investigation of electronic structure and optical properties of IrSn<sub>4</sub> Open
The ELF isosurfaces cutting along the 110 planes of β-IrSn 4 reveal the high anisotropic distributions of electrons with the itinerant character of Ir-5d and highly localized properties of Sn-5p electrons.
View article: Influence of severe plastic deformation on superconducting properties of Re and In
Influence of severe plastic deformation on superconducting properties of Re and In Open
The positron lifetime annihilation spectroscopy, magnetic and electrical resistivity data obtained for the pure polycrystalline rhenium and indium samples were compared with corresponding results obtained for samples after severe plastic d…
View article: Discovery of superconductivity in AlB<sub>2</sub>-type hexagonal YGa<sub>2</sub>
Discovery of superconductivity in AlB<sub>2</sub>-type hexagonal YGa<sub>2</sub> Open
A crystalline sample YGa 2 with the AlB 2 -type hexagonal structure has been synthesized using the self-flux method. We measured electrical resistivity and specific heat down to 0.4 K and in fields up to 200 mT. The obtained data reveal ty…
View article: DFT+U Study of Stability and Electronic Properties of Antiferromagnetic States of Sr<sub>4</sub>V<sub>2</sub>O<sub>6</sub>Fe<sub>2</sub>As<sub>2</sub>
DFT+U Study of Stability and Electronic Properties of Antiferromagnetic States of Sr<sub>4</sub>V<sub>2</sub>O<sub>6</sub>Fe<sub>2</sub>As<sub>2</sub> Open
We examine the magnetic stability and electronic properties of Sr4V2O6Fe2As2 in the antiferromagnetic order of V, including the A-type (A-AF) and the checkerboard-type (c-AF), within the LDA+U approximation.Contrary to other reports, our d…
View article: Relationship between morphological and physical properties in nanostructured CuMnO<sub>2</sub>
Relationship between morphological and physical properties in nanostructured CuMnO<sub>2</sub> Open
In this study, crednerite CuMnO 2 nanostructures were prepared using a hydrothermal method at 100 °C with different amounts of NaOH mineralizator. Obtained nanostructured crednerite CuMnO 2 with monoclinic structure (space group C2/m) exhi…
View article: Physical properties of the layered oxypnictide Sr<sub>2</sub>ScFeAsO<sub>3</sub>: a Mössbauer study down to 1.7 K
Physical properties of the layered oxypnictide Sr<sub>2</sub>ScFeAsO<sub>3</sub>: a Mössbauer study down to 1.7 K Open
A polycrystalline sample of Sr 2 ScFeAsO 3 was studied by 57 Fe Mössbauer spectroscopy down to 1.7 K. In contrast to the earlier Mössbauer data, the obtained in this work results indicate that Sr 2 ScFeAsO 3 is in paramagnetic state down t…
View article: Electronic Properties of Sr<sub>4</sub>V<sub>2</sub>O<sub>6</sub>Fe<sub>2</sub>As<sub>2</sub> Superconductor by Mean of DFT Investigations
Electronic Properties of Sr<sub>4</sub>V<sub>2</sub>O<sub>6</sub>Fe<sub>2</sub>As<sub>2</sub> Superconductor by Mean of DFT Investigations Open
Based on the Full potential linearized augmented plane wave (FLAPW) method, the electronic properties of incommensurate anti-ferromagnetic Sr4V2O6Fe2As2 with wave vector q = (0, 0, 0.306) have been investigated. Comparing total energy betw…
View article: Physical Properties of Superconducting V<sub>0.98</sub><sup>57</sup>Fe<sub>0.02</sub> Alloy Studied by TMS and SQUID Magnetometer
Physical Properties of Superconducting V<sub>0.98</sub><sup>57</sup>Fe<sub>0.02</sub> Alloy Studied by TMS and SQUID Magnetometer Open
A sample of vanadium with 2 at.% of 57 Fe was prepared by the arc-melting technique, annealed in a vacuum at 1270 K for 2 h and measured by 57 Fe transmission Mössbauer spectroscopy in the temperature range 1.4 K-300 K as well as using SQU…
View article: Electronic Structure of Th<sub>7</sub>Ru<sub>3</sub>
Electronic Structure of Th<sub>7</sub>Ru<sub>3</sub> Open
We report the results of scalar and fully relativistic electronic structure calculations for nonsuperconducting Th7Ru3, using the full-potential linearized-muffin-thin-orbital and full-potential linearized augmented-plane wave methods.The …