Niraj Aryal
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View article: EuAuSb: An odd-parity helical variation of altermagnetism
EuAuSb: An odd-parity helical variation of altermagnetism Open
EuAuSb is a triangular-lattice Dirac semimetal in which a topological Hall effect has been observed to develop in association with a magnetically-ordered phase. Our single-crystal neutron diffraction measurements have identified an incomme…
View article: Single-crystalline orthorhombic GdAlGe as a rare-earth magnetic Dirac nodal-line metal
Single-crystalline orthorhombic GdAlGe as a rare-earth magnetic Dirac nodal-line metal Open
Crystal engineering is a method for discovering new quantum materials and phases, which may be achieved by external pressure or strain. Chemical pressure is unique in that it generates internal pressure perpetually to the lattice. As an ex…
View article: Nernst power factor and figure of merit in the compensated semimetal ScSb
Nernst power factor and figure of merit in the compensated semimetal ScSb Open
Recently, topological semimetals have emerged as strong candidates for solid state thermomagnetic refrigerators due to their enhanced Nernst effect. This enhancement arises from the combined contributions of the Berry curvature induced ano…
View article: Investigation of structural, dynamical, electronic and magnetic properties of MX2(M = Mo, X = Se, Te) materials
Investigation of structural, dynamical, electronic and magnetic properties of MX2(M = Mo, X = Se, Te) materials Open
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) materials have potential applications in the field of device applications. In the present work, we explored the structural, dynamical, electronic, and magnetic properties of MoS…
View article: Origin of metal-insulator transitions in the parent compounds of ruthenium-pnictide superconductors
Origin of metal-insulator transitions in the parent compounds of ruthenium-pnictide superconductors Open
Here we study the interplay of the structural phase transition, flat electronic band dispersion, and metal-to-insulator transition (MIT) in the parent compounds of the Ru-pnictide superconductors by using first-principles calculations. Our…
View article: Machine learning approach for vibronically renormalized electronic band structures
Machine learning approach for vibronically renormalized electronic band structures Open
We present a machine learning (ML) method for efficient computation of vibrational thermal expectation values of physical properties from first principles. Our approach is based on the non-perturbative frozen phonon formulation in which st…
View article: Origin of light-induced metastability in ZrTe$_5$
Origin of light-induced metastability in ZrTe$_5$ Open
We study the non-equilibrium electronic structure of a model Dirac semimetal ZrTe$_5$ by using time-and-angle resolved photoemission spectroscopy and density functional theory-based electron and phonon calculations. By measuring the electr…
View article: On the origin of metal-insulator transitions in the parent compounds of ruthenium-pnictide superconductors
On the origin of metal-insulator transitions in the parent compounds of ruthenium-pnictide superconductors Open
We study the interplay of the structural phase transition, flat electronic band dispersion, and metal-to-insulator transition (MIT) in the parent compounds of the Ru-pnictide superconductors by using first-principles calculations. Our elec…
View article: Electronic structure and magnetic and transport properties of antiferromagnetic Weyl semimetal GdAlSi
Electronic structure and magnetic and transport properties of antiferromagnetic Weyl semimetal GdAlSi Open
Here we report the topological electronic structure, magnetic, and magnetotransport properties of a noncentrosymmetric compound GdAlSi. Magnetic susceptibility shows an antiferromagnetic transition at TN = 32 K. In-plane isothermal magneti…
View article: Electronic structure, magnetic and transport properties of antiferromagnetic Weyl semimetal GdAlSi
Electronic structure, magnetic and transport properties of antiferromagnetic Weyl semimetal GdAlSi Open
We report the topological electronic structure, magnetic, and magnetotransport properties of a noncentrosymmetric compound GdAlSi. Magnetic susceptibility shows an antiferromagnetic transition at $T_\mathrm{N}$ = 32 K. In-plane isothermal …
View article: Fluctuating Ru trimer precursor to a two-stage electronic transition in RuP
Fluctuating Ru trimer precursor to a two-stage electronic transition in RuP Open
Superconductivity in binary ruthenium pnictides occurs proximal to and upon suppression of a non-magnetic ground state, preceded by a pseudogap phase associated with Fermi surface instability, and its critical temperature, Tc, is maximized…
View article: Colossal Nernst power factor in topological semimetal NbSb$_2$
Colossal Nernst power factor in topological semimetal NbSb$_2$ Open
Today solid-state cooling technologies below liquid nitrogen boiling temperature (77 K), crucial to quantum information technology and probing quantum state of matter, are greatly limited due to the lack of good thermoelectric and/or therm…
View article: The Hydrophobin Gene Family Confers a Fitness Trade-off between Spore Dispersal and Host Colonization in Penicillium expansum
The Hydrophobin Gene Family Confers a Fitness Trade-off between Spore Dispersal and Host Colonization in Penicillium expansum Open
Hydrophobins are amphipathic secreted proteins uniquely found in filamentous fungi. These proteins self-assemble and constitute the outer most layer of fungal surfaces thus mediating multiple aspects of fungal interactions with their envir…
View article: Thermal transport properties of IrSbSe
Thermal transport properties of IrSbSe Open
Here we report a thermal transport study of IrSbSe, which crystallizes in a noncentrosymmetric cubic structure with the P213 space group and shows a narrow-gap semiconducting behavior. The large discrepancy between the activation energy fo…
View article: Pattern of Deaths among Women of Reproductive Age in Major Autopsy Centres of Capital Cities of the Seven Provinces of Nepal.
Pattern of Deaths among Women of Reproductive Age in Major Autopsy Centres of Capital Cities of the Seven Provinces of Nepal. Open
Suicide was the commonest manner of death among the autopsies of females of the reproductive age group in Nepal. Appropriate preventive strategies need to be developed to uplift the overall health, socioeconomic status, and general wellbei…
View article: Thermal transport properties of IrSbSe
Thermal transport properties of IrSbSe Open
We report a thermal transport study of IrSbSe, which crystallizes in a noncentrosymmetric cubic structure with the $P2_13$ space group and shows a narrow-gap semiconducting behavior. The large discrepancy between the activation energy for …
View article: Role of local Ru hexamers in superconductivity of ruthenium phosphide
Role of local Ru hexamers in superconductivity of ruthenium phosphide Open
Superconductivity in binary ruthenium pnictides occurs proximal to and upon suppression of a mysterious non-magnetic ground state, preceded by a pseudogap phase associated with Fermi surface instability, and its critical temperature, Tc, i…
View article: Role of Local Ru Hexamers in Superconductivity of Ruthenium Phosphide
Role of Local Ru Hexamers in Superconductivity of Ruthenium Phosphide Open
Superconductivity in binary ruthenium pnictides occurs proximal to and upon suppression of a mysterious non-magnetic ground state, preceded by a pseudogap phase associated with Fermi surface instability, and its critical temperature, T$_{c…
View article: Topological Antiferromagnetic Semimetal for Spintronics: A Case Study of a Layered Square Net System EuZnSb$_2$
Topological Antiferromagnetic Semimetal for Spintronics: A Case Study of a Layered Square Net System EuZnSb$_2$ Open
We use the first principles and effective Hamiltonian methods to study the electronic structure and magnetic properties of a recently synthesized layered antiferromagnetic square net topological semimetal EuZnSb$_2$ [1]. The main message o…
View article: Photoinduced anisotropic lattice dynamic response and domain formation in thermoelectric SnSe
Photoinduced anisotropic lattice dynamic response and domain formation in thermoelectric SnSe Open
Identifying and understanding the mechanisms behind strong phonon–phonon scattering in condensed matter systems is critical to maximizing the efficiency of thermoelectric devices. To date, the leading method to address this has been to met…
View article: Role of electron correlations in some Weyl systems
Role of electron correlations in some Weyl systems Open
We are discussing a model to understand previously obtained results on Weyl semimetals as realized in MoTe 2 using DFT and DFT+U calculations. The model is motivated from general principles and we use it to investigate the effects of Coulo…
View article: Photoinduced anisotropic lattice dynamic response and domain formation\n in thermoelectric SnSe
Photoinduced anisotropic lattice dynamic response and domain formation\n in thermoelectric SnSe Open
Identifying and understanding the mechanisms behind strong phonon-phonon\nscattering in condensed matter systems is critical to maximizing the efficiency\nof thermoelectric devices. To date, the leading method to address this has been\nto …
View article: Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals
Experimental Observation and Spin Texture of Dirac Node Arcs in Tetradymite Topological Metals Open
We report the observation of a nontrivial spin texture in Dirac node arcs, i.e., novel topological objects formed when Dirac cones of massless particles extend along an open one-dimensional line in momentum space. We find that such states …
View article: Multiple Dirac nodes and symmetry protected Dirac nodal line in orthorhombic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>-RhSi
Multiple Dirac nodes and symmetry protected Dirac nodal line in orthorhombic -RhSi Open
Owing to their chiral cubic structure, exotic multifold topological\nexcitations have been predicted and recently observed in transition metal\nsilicides like $\\beta$-RhSi. Herein, we report that the topological character\nof RhSi is also…
View article: Bulk Fermi surfaces of the Dirac type-II semimetallic candidate NiTe2
Bulk Fermi surfaces of the Dirac type-II semimetallic candidate NiTe2 Open
Here, we present a study on the Fermi-surface of the Dirac type-II semi-metallic candidate NiTe$_2$ via the temperature and angular dependence of the de Haas-van Alphen (dHvA) effect measured in single-crystals grown through Te flux. In co…
View article: Numerically exact study of Weyl superconductivity
Numerically exact study of Weyl superconductivity Open
We study the interplay of interactions and topology in a pseudo-spin Weyl system, obtained from a minimally modified Hubbard model, using the numerically exact auxiliary-field quantum Monte Carlo method complemented by mean-field theory. W…