Ifeanyi John Onuorah
YOU?
Author Swipe
View article: Unveiling the nature of electronic transitions in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>RbV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math> with avoided level crossing <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>μ</mml:mi><mml:mi>SR</mml:mi></mml:mrow></mml:math>
Unveiling the nature of electronic transitions in with avoided level crossing Open
Layered kagome metals AV3Sb5 provide a unique platform for studying the interplay between a variety of electronic orders, including superconductivity, charge density waves, nematic phases, and more. Understanding the evolution of the elect…
View article: Anisotropic superconductivity in the quasi-one-dimensional superconductor V2Ga5
Anisotropic superconductivity in the quasi-one-dimensional superconductor V2Ga5 Open
The intermetallic quasi-one-dimensional binary superconductor V2Ga5 was recently found to exhibit a topologically nontrivial normal state, making it a natural candidate for a topological superconductor. By combining d…
View article: Electronic structure calculations for muon spectroscopy<sup>*</sup>
Electronic structure calculations for muon spectroscopy<sup>*</sup> Open
Muon spectroscopy has become a leading tool for the investigation of local magnetic fields in condensed matter physics, finding applications in the study of superconductivity, magnetism, ionic diffusion in battery materials, and numerous o…
View article: positivemuon/aiida-muon: v1.0.3
positivemuon/aiida-muon: v1.0.3 Open
AiiDA plugin for finding candidate implantation site(s) for the muon and contact hyperfine contribution to the local field.
View article: Automated computational workflows for muon spin spectroscopy
Automated computational workflows for muon spin spectroscopy Open
Positive muon spin rotation and relaxation spectroscopy is a well established experimental technique. We present here computational workflows to automate the corresponding simulations, boosting the predictive power of this technique.
View article: Unveiling the nature of electronic transitions in RbV$_3$Sb$_5$ with Avoided Level Crossing $μ$SR
Unveiling the nature of electronic transitions in RbV$_3$Sb$_5$ with Avoided Level Crossing $μ$SR Open
Kagome superconductors AV$_{3}$Sb$_{5}$ provide a unique platform for studying the interplay between a variety of electronic orders, including superconductivity, charge density waves, nematic phases and more. Understanding the evolution of…
View article: Unraveling the magnetic ground state in the alkali-metal lanthanide oxide <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Na</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Pr</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Unraveling the magnetic ground state in the alkali-metal lanthanide oxide Open
Here, a comprehensive set of muon spin spectroscopy and neutron scattering measurements supported by ab initio and model Hamiltonian simulations have been used to investigate the magnetic ground state of Na2PrO3. μSR…
View article: Unraveling the magnetic ground-state in alkali-metal lanthanide oxide Na$_2$PrO$_3$
Unraveling the magnetic ground-state in alkali-metal lanthanide oxide Na$_2$PrO$_3$ Open
A comprehensive set of muon spin spectroscopy and neutron scattering measurements supported by ab-initio and model Hamiltonian simulations have been used to investigate the magnetic ground state of Na$_2$PrO$_3$. $μ$SR reveals Néel antifer…
View article: Ubiquitous Order‐Disorder Transition in the Mn Antisite Sublattice of the (MnBi<sub>2</sub>Te<sub>4</sub>)(Bi<sub>2</sub>Te<sub>3</sub>)<sub><i>n</i></sub> Magnetic Topological Insulators
Ubiquitous Order‐Disorder Transition in the Mn Antisite Sublattice of the (MnBi<sub>2</sub>Te<sub>4</sub>)(Bi<sub>2</sub>Te<sub>3</sub>)<sub><i>n</i></sub> Magnetic Topological Insulators Open
Magnetic topological insulators (TIs) herald a wealth of applications in spin‐based technologies, relying on the novel quantum phenomena provided by their topological properties. Particularly promising is the (MnBi 2 Te 4 )(Bi 2 Te 3 ) n l…
View article: Ubiquitous order-disorder transition in the Mn antisite sublattice of the (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_n$ magnetic topological insulators
Ubiquitous order-disorder transition in the Mn antisite sublattice of the (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)$_n$ magnetic topological insulators Open
Magnetic topological insulators (TIs) herald a wealth of applications in spin-based technologies, relying on the novel quantum phenomena provided by their topological properties. Particularly promising is the (MnBi$_2$Te$_4$)(Bi$_2$Te$_3$)…
View article: Magnetostriction-Driven Muon Localization in an Antiferromagnetic Oxide
Magnetostriction-Driven Muon Localization in an Antiferromagnetic Oxide Open
Magnetostriction results from the coupling between magnetic and elastic degrees of freedom. Though it is associated with a relatively small energy, we show that it plays an important role in determining the site of an implanted muon, so th…
View article: Magnetostriction-Driven Muon Localization in an Antiferromagnetic Oxide
Magnetostriction-Driven Muon Localization in an Antiferromagnetic Oxide Open
Magnetostriction drives a rhombohedral distortion in the cubic rock salt antiferromagnet MnO at the Néel temperature $T_{N}=118$ K. As an unexpected consequence we show that this distortion acts to localize the site of an implanted muon du…
View article: Magnetic properties and muon localization in Cr<sub>2</sub>S<sub>3</sub>
Magnetic properties and muon localization in Cr<sub>2</sub>S<sub>3</sub> Open
We investigate the magnetic ground state of rhombohedral chromium sulphide Cr 2 S 3 by density functional theory. We identify the muon implantation sites, their hyperfine couplings and the role of charge states in this compound. Our calcul…
View article: Frustrated network of indirect exchange paths between tetrahedrally coordinated Co in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">Ba</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">CoO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>
Frustrated network of indirect exchange paths between tetrahedrally coordinated Co in Open
We present a detailed study of the electronic and magnetic interactions of Ba2CoO4, structurally very uncommon because of the isolated CoO4 distorted tetrahedral coordination. We show the presence of Co(d)-O(p) hybridized states characteri…
View article: Intrinsic Nature of Spontaneous Magnetic Fields in Superconductors with Time-Reversal Symmetry Breaking
Intrinsic Nature of Spontaneous Magnetic Fields in Superconductors with Time-Reversal Symmetry Breaking Open
We present a systematic investigation of muon-stopping states in superconductors that reportedly exhibit spontaneous magnetic fields below their transition temperatures due to time-reversal symmetry breaking. These materials include elemen…
View article: A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets. Open data set
A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets. Open data set Open
Data supporting the original figures 2 and 3 of the related publication.
View article: A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets. Open data set
A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets. Open data set Open
Data supporting the original figures 2 and 3 of the related publication.
View article: A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets
A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets Open
We discuss a cost-effective approach to understand magnetic relaxation in the new generation of rare-earth single-molecule magnets. It combines ab initio calculations of the crystal field parameters, of the magneto-elastic coupling with lo…
View article: Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound
Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound Open
View article: UNDI: An open-source library to simulate muon-nuclear interactions in solids
UNDI: An open-source library to simulate muon-nuclear interactions in solids Open
View article: Pressure-induced antiferromagnetic dome in the heavy-fermion <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Yb</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Pd</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>In</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sn</mml:mi><mml:mi>x</mml:mi></mml:msub></mml:mrow></mml:math> system
Pressure-induced antiferromagnetic dome in the heavy-fermion system Open
In the heavy-fermion system $Yb_2Pd_2In_{1-x}Sn_x$, the interplay of\ncrystal-field splitting, Kondo effect, and Ruderman-Kittel-Kasuya-Yosida\ninteractions leads to complex chemical-, pressure-, and magnetic-field phase\ndiagrams, still t…
View article: Enhancing muon spin spectroscopy: from atomistic simulation of muon implantation site to hyperfine coupling calculation
Enhancing muon spin spectroscopy: from atomistic simulation of muon implantation site to hyperfine coupling calculation Open
This thesis consists mainly of density functional theory (DFT) calculations, complemented by specific theoretical developments, to determine the implantation site of the positive muon and its magnetic hyperfine coupling in a range of selec…
View article: Disentangling superconducting and magnetic orders in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>NaFe</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi>As</mml:mi></mml:mrow></mml:math> using muon spin rotation
Disentangling superconducting and magnetic orders in using muon spin rotation Open
Muon spin rotation and relaxation studies have been performed on a “111” family of iron-based superconductors, NaFe1−xNixAs, using single crystalline samples with Ni concentrations x=0, 0.4, 0.6, 1.0, 1.3, and 1.5%. Static magnetic order w…
View article: Muon contact hyperfine field in metals: A DFT calculation
Muon contact hyperfine field in metals: A DFT calculation Open
In positive muon spin rotation and relaxation spectroscopy it is becoming\nnowadays customary to take advantage of Density Functional Theory (DFT) based\ncomputational methods to aid the experimental data analysis. DFT aided muon\nsite det…
View article: Introduction and a Quick Look at MUESR, the Magnetic Structure and mUon Embedding Site Refinement Suite
Introduction and a Quick Look at MUESR, the Magnetic Structure and mUon Embedding Site Refinement Suite Open
View article: First-principles investigation of MnP magnetic states precursors of superconductivity under high pressure
First-principles investigation of MnP magnetic states precursors of superconductivity under high pressure Open
The discovery of a superconducting dome in the proximity of the magnetic to paramagnetic transition in the electronic phase diagram of MnP as a function of hydrostatic pressure has renewed the interest in the magnetic properties of this bi…