Keith M. Taddei
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View article: Disorder-induced universality and scaling in hole-doped iron-based superconductors
Disorder-induced universality and scaling in hole-doped iron-based superconductors Open
View article: Novel bipartite entanglement in the quantum dimer magnet Yb$_2$Be$_2$SiO$_7$
Novel bipartite entanglement in the quantum dimer magnet Yb$_2$Be$_2$SiO$_7$ Open
The quantum dimer magnet, with antiferromagnetic intradimer and interdimer Heisenberg exchange between spin-1/2 moments, is known to host an up/down - down/up singlet ground state when the intradimer exchange is dominant. Rare-earth-based …
View article: Machine learning enabled accurate prediction of structural and magnetic properties of cobalt ferrite
Machine learning enabled accurate prediction of structural and magnetic properties of cobalt ferrite Open
A machine learning enabled computational approach has been developed to accurately predict the equilibrium degree of inversion in spinel lattice and some magnetic properties of cobalt ferrite (CoFe₂O₄) crystal. The computational approach i…
View article: Interesting magnetic properties of a dubious Weyl semimetal
Interesting magnetic properties of a dubious Weyl semimetal Open
Often in the search for new exotic phases of matter we turn to a priori predictions of material’s properties to guide our way. This is commonly met with mixed results due to the complexity of real materials as compared with their idealized…
View article: Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage
Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage Open
Porous solids can accommodate and release molecular hydrogen readily, making them attractive for minimizing the energy requirements for hydrogen storage relative to physical storage systems. However, H2 adsorption enthalpies in …
View article: Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage
Geometric Tuning of Coordinatively Unsaturated Copper(I) Sites in Metal–Organic Frameworks for Ambient-Temperature Hydrogen Storage Open
Porous solids can accommodate and release molecular hydrogen readily, making them attractive for minimizing the energy requirements for hydrogen storage relative to physical storage systems. However, H2 adsorption enthalpies in such materi…
View article: Ba<sub>4</sub>RuMn<sub>2</sub>O<sub>10</sub>: A Noncentrosymmetric Polar Crystal Structure with Disordered Trimers
Ba<sub>4</sub>RuMn<sub>2</sub>O<sub>10</sub>: A Noncentrosymmetric Polar Crystal Structure with Disordered Trimers Open
Phase-pure polycrystalline Ba4RuMn2O10 was prepared and determined to adopt the noncentrosymmetric polar crystal structure (space group Cmc21) based on results of second harmonic generatio…
View article: Extracting the electronic structure of light elements in bulk materials through a Compton scattering method in the readily accessible hard x-ray regime
Extracting the electronic structure of light elements in bulk materials through a Compton scattering method in the readily accessible hard x-ray regime Open
Our Compton profile measurements of Ti and TiH2 using readily available hard X-ray radiation at 27.5 keV, detected by both a Hitachi Vortex silicon-drift detector and a high-resolution superconducting transition-edge sensor array, are foun…
View article: Tailoring physical properties of crystals through synthetic temperature control: A case study for new polymorphic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>NbFeT</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> phases
Tailoring physical properties of crystals through synthetic temperature control: A case study for new polymorphic phases Open
Growth parameters play a significant role in the crystal quality and physical properties of layered materials. Here we present a case study on a van der Waals magnetic NbFeTe2 material. Two different types of polymorphic NbFeTe2 phases, sy…
View article: Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases
Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases Open
Growth parameters play a significant role in the crystal quality and physical properties of layered materials. Here we present a case study on a van der Waals magnetic NbFeTe2 material. Two different types of polymorphic NbFeTe2 phases, sy…
View article: Coexistence of Long-Range Magnetic Order and Magnetic Frustration of a Novel Two-Dimensional S = 1/2 Structure: Na2Cu3(SeO3)4
Coexistence of Long-Range Magnetic Order and Magnetic Frustration of a Novel Two-Dimensional S = 1/2 Structure: Na2Cu3(SeO3)4 Open
Novel quantum materials offer the opportunity to expand next-generation computers, high-precision sensors, and new energy technologies. Among the most important factors influencing the development of quantum materials research is the abili…
View article: Stripe magnetic order and field-induced quantum criticality in the perfect triangular-lattice antiferromagnet CsCeSe$_2$
Stripe magnetic order and field-induced quantum criticality in the perfect triangular-lattice antiferromagnet CsCeSe$_2$ Open
The two-dimensional triangular-lattice antiferromagnet (TLAF) is a textbook example of frustrated magnetic systems. Despite its simplicity, the TLAF model exhibits a highly rich and complex magnetic phase diagram, featuring numerous distin…
View article: Multiple incommensurate magnetic states in the kagome antiferromagnet <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:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Cl</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>
Multiple incommensurate magnetic states in the kagome antiferromagnet Open
The kagome lattice can host exotic magnetic phases arising from frustrated and competing magnetic interactions. However, relatively few insulating kagome materials exhibit incommensurate magnetic ordering. Here, we present a study of the m…
View article: Canted Antiferromagnetism in Polar MnSiN$_2$ with High Néel Temperature
Canted Antiferromagnetism in Polar MnSiN$_2$ with High Néel Temperature Open
MnSiN$_2$ is a transition metal nitride with Mn and Si ions displaying an ordered distribution on the cation sites of a distorted wurtzite-derived structure. The Mn$^{2+}$ ions reside on a 3D diamond-like covalent network with strong super…
View article: Electrochemical Control of Magnetism on the Breathing Kagome Network of Li<sub><i>x</i></sub>ScMo<sub>3</sub>O<sub>8</sub>
Electrochemical Control of Magnetism on the Breathing Kagome Network of Li<sub><i>x</i></sub>ScMo<sub>3</sub>O<sub>8</sub> Open
Controlling properties within a given functional inorganic material structure type is often accomplished through tuning the electronic occupation, which is in turn dictated by the elemental composition determined at the time of material pr…
View article: Structure and magnetism of the triangular lattice material YbBO<sub>3</sub>
Structure and magnetism of the triangular lattice material YbBO<sub>3</sub> Open
YbBO 3 is a member of the orthoborate family of materials which contains a triangular arrangement of Yb 3+ ions. Here we study the physical properties of YbBO 3 with neutron diffraction, inelastic neutron scattering, specific heat, and ac …
View article: Quantum disordered ground state in the triangular-lattice magnet NaRuO2
Quantum disordered ground state in the triangular-lattice magnet NaRuO2 Open
View article: Multiple Incommensurate Magnetic States in the Kagome Antiferromagnet Na2Mn3Cl8
Multiple Incommensurate Magnetic States in the Kagome Antiferromagnet Na2Mn3Cl8 Open
The kagome lattice can host exotic magnetic phases arising from frustrated and competing magnetic interactions. However, relatively few insulating kagome materials exhibit incommensurate magnetic ordering. Here, we present a study of the m…
View article: Two-Dimensional Short-Range Chemical Ordering in Ba1-xNaxFe2As2
Two-Dimensional Short-Range Chemical Ordering in Ba1-xNaxFe2As2 Open
A true understanding of the properties of pnictide superconductors require the development of high-quality materials and performing measurements designed to unravel their intrinsic properties and short-range nematic correlations which are …
View article: Zigzag magnetic order and possible Kitaev interactions in the spin-1 honeycomb lattice <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">KNiAsO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>
Zigzag magnetic order and possible Kitaev interactions in the spin-1 honeycomb lattice Open
Despite the exciting implications of the Kitaev spin Hamiltonian, finding and confirming the quantum spin-liquid state have proven incredibly difficult. Recently, the applicability of the model has been expanded through the development of …
View article: Magnetic excitation linking quasi-one-dimensional Chevrel-type selenide and arsenide superconductors
Magnetic excitation linking quasi-one-dimensional Chevrel-type selenide and arsenide superconductors Open
This work found unexpected magnetism within two “condensed Chevrel phase” compounds, In2Mo6Se6 and Rb2Mo6Se6. The electrons inside condensed Chevrel phases act as if their movement is trapped along a single line. This effect, known as quas…
View article: Spin structure and dynamics of the topological semimetal Co3Sn2-xInxS2
Spin structure and dynamics of the topological semimetal Co3Sn2-xInxS2 Open
View article: Line-Graph Approach to Spiral Spin Liquids
Line-Graph Approach to Spiral Spin Liquids Open
Competition among exchange interactions is able to induce novel spin correlations on a bipartite lattice without geometrical frustration. A prototype example is the spiral spin liquid, which is a correlated paramagnetic state characterized…
View article: Spin and charge density waves in quasi-one-dimensional <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>KMn</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Bi</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Spin and charge density waves in quasi-one-dimensional Open
The observation that pressure could suppress antiferromagnetic (AFM) order in quasi-one-dimensional A Mn6 Bi5 Mn-cluster chain materials (A = Na, K, Rb, and Cs) and lead to a superconducting …
View article: Spin structure and dynamics of the topological semimetal Co$_{3}$Sn$_{2-x}$In$_{x}$S$_{2}$
Spin structure and dynamics of the topological semimetal Co$_{3}$Sn$_{2-x}$In$_{x}$S$_{2}$ Open
The anomalous Hall effect (AHE), typically observed in ferromagnetic (FM) metals with broken time-reversal symmetry, depends on electronic and magnetic properties. In Co$_{3}$Sn$_{2-x}$In$_{x}$S$_{2}$, a giant AHE has been attributed to Be…
View article: Entropy Engineering and Tunable Magnetic Order in the Spinel High-Entropy Oxide
Entropy Engineering and Tunable Magnetic Order in the Spinel High-Entropy Oxide Open
Spinel oxides are an ideal setting to explore the interplay between configurational entropy, site selectivity, and magnetism in high-entropy oxides (HEOs). In this work, we characterize the magnetic properties of the spinel (Cr, Mn, Fe, Co…
View article: Line-Graph Approach to Spiral Spin Liquids
Line-Graph Approach to Spiral Spin Liquids Open
Competition among exchange interactions is able to induce novel spin correlations on a bipartite lattice without geometrical frustration. A prototype example is the spiral spin liquid, which is a correlated paramagnetic state characterized…
View article: Presence of Induced Weak Ferromagnetism in Fe-Substituted YFexCr1−xO3 Crystalline Compounds
Presence of Induced Weak Ferromagnetism in Fe-Substituted YFexCr1−xO3 Crystalline Compounds Open
Fe-substituted YFexCr1−xO3 crystalline compounds show promising magnetic and multiferroic properties. Here we report the synthesis and characterization of several compositions from this series. Using the autocombustion route, various compo…
View article: SrNi(VO4)(OH): The High-Temperature Hydrothermal Synthesis and Magnetic Properties of an Adelite-Descloizite-Type Structure
SrNi(VO4)(OH): The High-Temperature Hydrothermal Synthesis and Magnetic Properties of an Adelite-Descloizite-Type Structure Open
Single crystals of a new transition metal adelite-descloizite-type structure were synthesized using a high temperature (580 °C) high-pressure hydrothermal technique. Single crystal X-ray diffraction and energy dispersive X-ray analysis (ED…
View article: Spin and charge density waves in the quasi-one-dimensional KMn6Bi5
Spin and charge density waves in the quasi-one-dimensional KMn6Bi5 Open
AMn6Bi5 materials (A = Na, K, Rb and Cs) consisting of unique Mn-cluster chains emerge as a new family of superconductors with the suppression of their antiferromagnetic (AFM) order under high pressures. Here, we report transverse incommen…