Ryan Baumbach
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View article: Evolution of magnetic bubble domains in the uniaxial ferromaget CeRu 2 Ga 2 B inferred from the Hall effect and ac magnetic susceptibility
Evolution of magnetic bubble domains in the uniaxial ferromaget CeRu 2 Ga 2 B inferred from the Hall effect and ac magnetic susceptibility Open
We study the Hall effect, AC magnetic susceptibility (χac), and magnetic force microscopy of the
uniaxial ferromagnet CeRu2Ga2B with a centrosymmetric crystal structure. We observe a finite
topological Hall effect (THE) within the or…
View article: High-magnetic-field phases in U <sub>1-x</sub> Th <sub>x</sub> Te <sub>2</sub>
High-magnetic-field phases in U <sub>1-x</sub> Th <sub>x</sub> Te <sub>2</sub> Open
At temperatures T much lower than its superconducting critical temperature T c = 2.1 K, the heavy fermion superconductor UTe 2 has a unique phase diagram of magnetic field H vs. φ and θ, angles H is tilted from the b -axis toward the a - a…
View article: Epitaxial Stabilization and Emergent Charge Order in Copper Selenide Thin Films
Epitaxial Stabilization and Emergent Charge Order in Copper Selenide Thin Films Open
We demonstrate epitaxial growth of copper selenide (Cu$_{2-x}$Se) thin films in both cubic and rhombohedral phases, achieved via molecular beam epitaxy on Al$_2$O$_3$ (001) substrates. Remarkably, the high-temperature cubic phase -- which …
View article: Observation of odd-parity superconductivity in UTe <sub>2</sub>
Observation of odd-parity superconductivity in UTe <sub>2</sub> Open
Symmetry properties of the order parameter are among the most fundamental characteristics of a superconductor. UTe 2 , which was found to feature an exceedingly large upper critical field and striking reentrant behavior at low temperatures…
View article: High-Magnetic Field Phases in U$_{1-x}$Th$_x$Te$_2$
High-Magnetic Field Phases in U$_{1-x}$Th$_x$Te$_2$ Open
At temperatures much lower than its superconducting critical temperature $T_c$ of 2.1 K, the heavy fermion superconductor UTe$_2$ has a remarkable phase diagram of magnetic field $H$ vs. angles $ϕ$ and $θ$ at which $H$ is tilted away from …
View article: Large Kohn anomaly and phonon collapse induced by charge density wave in UPt$_2$Si$_2$
Large Kohn anomaly and phonon collapse induced by charge density wave in UPt$_2$Si$_2$ Open
Using high-energy-resolution inelastic x-ray scattering, we observe anomalous softening and damping of the transverse acoustic phonon in UPt$_2$Si$_2$ as the system is cooled towards the charge density wave (CDW) transition temperature, T$…
View article: Role of CeNiSi<sub>2</sub> and BaNiSn<sub>3</sub> Structure Types in the Emergent Magnetism of the Homologous Series Ln<sub><i>n</i>+1</sub>M<i><sub>n</sub></i>X<sub>3<i>n</i>+1</sub>:Ce<sub>4</sub>Fe<sub>3</sub>Ge<sub>10</sub>
Role of CeNiSi<sub>2</sub> and BaNiSn<sub>3</sub> Structure Types in the Emergent Magnetism of the Homologous Series Ln<sub><i>n</i>+1</sub>M<i><sub>n</sub></i>X<sub>3<i>n</i>+1</sub>:Ce<sub>4</sub>Fe<sub>3</sub>Ge<sub>10</sub> Open
The synthesis and characterization of Ce4Fe3Ge10, n =3 member of the homologous series Lnn+1MnX3n+1 (Ln = lanthanides, M = transition metal, X = tetrel), is reported. The structure can be modelled with the Cmcm space group adopting the Eu2…
View article: Effect of Ni Doping on the Thermoelectric Properties of YbCo2Zn20
Effect of Ni Doping on the Thermoelectric Properties of YbCo2Zn20 Open
Thermoelectric devices are both solid-state heat pumps and energy generators. Having a reversible process without moving parts is of high importance for applications in remote locations or under extreme conditions. Yet, most thermoelectric…
View article: Much more to explore with an oxidation state of nearly four: Pr valence instability in intermetallic <i>m</i> -Pr <sub>2</sub> Co <sub>3</sub> Ge <sub>5</sub>
Much more to explore with an oxidation state of nearly four: Pr valence instability in intermetallic <i>m</i> -Pr <sub>2</sub> Co <sub>3</sub> Ge <sub>5</sub> Open
For some intermetallic compounds containing lanthanides, structural transitions can result in intermediate electronic states between trivalency and tetravalency; however, this is rarely observed for praseodymium compounds. The dominant tri…
View article: Structural transition and uranium valence change in UTe$_2$ at high pressure revealed by x-ray diffraction and spectroscopy
Structural transition and uranium valence change in UTe$_2$ at high pressure revealed by x-ray diffraction and spectroscopy Open
High pressure x-ray diffraction up to 30 GPa and resonant emission x-ray spectroscopy and partial fluorescence yield x-ray absorption spectroscopy up to 52 GPa were used to study how the structural and electronic properties of UTe$_2$ evol…
View article: CSD 2254793: Experimental Crystal Structure Determination
CSD 2254793: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2254794: Experimental Crystal Structure Determination
CSD 2254794: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2272134: Experimental Crystal Structure Determination
CSD 2272134: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Crystal Growth and Physical Properties of Hybrid CoSn–YCo<sub>6</sub>Ge<sub>6</sub> Structure Type Ln<sub><i>x</i></sub>Co<sub>3</sub>(Ge<sub>1–<i>y</i></sub>Sn<sub><i>y</i></sub>)<sub>3</sub> (Ln = Y, Gd)
Crystal Growth and Physical Properties of Hybrid CoSn–YCo<sub>6</sub>Ge<sub>6</sub> Structure Type Ln<sub><i>x</i></sub>Co<sub>3</sub>(Ge<sub>1–<i>y</i></sub>Sn<sub><i>y</i></sub>)<sub>3</sub> (Ln = Y, Gd) Open
There is an ongoing interest in kagome materials because they offer tunable platforms at the intersection of magnetism and electron correlation. Herein, we examine single crystals of new kagome materials, LnxCo3(Ge1-ySny)3 (Ln = Y, Gd; y =…
View article: Observation of odd-parity superconductivity in UTe2
Observation of odd-parity superconductivity in UTe2 Open
Symmetry properties of the order parameter are among the most fundamental characteristics of a superconductor. The pairing symmetry of recently discovered heavy fermion superconductor UTe2 featuring an exceedingly large upper critical fiel…
View article: Complex Antiferromagnetic Order in the Metallic Triangular Lattice Compound SmAuAl$_4$Ge$_2$
Complex Antiferromagnetic Order in the Metallic Triangular Lattice Compound SmAuAl$_4$Ge$_2$ Open
The compounds $Ln$AuAl$_4$Ge$_2$ ($Ln$ $=$ lanthanide) form in a structure that features two-dimensional triangular lattices of $Ln$ ions that are stacked along the crystalline $c$ axis. Together with crystal electric field effects, magnet…
View article: Charge Density Wave Order in Superconducting Topological Insulator Nbx-Bi2Se3
Charge Density Wave Order in Superconducting Topological Insulator Nbx-Bi2Se3 Open
Spontaneously broken symmetry in the ground state of Bi-based topological materials can lead to promising Topological superconductors, such as Cu-Bi2Se3, Sr-Bi2Se3 and Nb-Bi2Se3. In recent studies, coexistence of multiple Fermi surface fea…
View article: CCDC 2180229: Experimental Crystal Structure Determination
CCDC 2180229: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Mn(Pt$_{1-x}$Pd$_{x}$)$_5$P: Isovalent Tuning of Mn Sublattice Magnetic Order
Mn(Pt$_{1-x}$Pd$_{x}$)$_5$P: Isovalent Tuning of Mn Sublattice Magnetic Order Open
We report the growth and characterization of MnPd$_5$P, a ferromagnet with T$_C$ $\approx$ 295 K, and conduct a substitutional study with its antiferromagnetic analogue MnPt$_5$P. We grow single crystals of MnPd$_5$P and Mn(Pt$_{1-x}$Pd$_x…
View article: Thickness- and Twist-Angle-Dependent Interlayer Excitons in Metal Monochalcogenide Heterostructures
Thickness- and Twist-Angle-Dependent Interlayer Excitons in Metal Monochalcogenide Heterostructures Open
Interlayer excitons, or bound electron-hole pairs whose constituent quasiparticles are located in distinct stacked semiconducting layers, are being intensively studied in heterobilayers of two-dimensional semiconductors. They owe their exi…
View article: Thickness and twist angle dependent interlayer excitons in metal monochalcogenide heterostructures
Thickness and twist angle dependent interlayer excitons in metal monochalcogenide heterostructures Open
Interlayer excitons, or bound electron-hole pairs whose constituent quasiparticles are located in distinct stacked semiconducting layers, are being intensively studied in heterobilayers of two dimensional semiconductors. They owe their exi…
View article: Anisotropic magnetic and transport properties of orthorhombic o-Pr<sub>2</sub>Co<sub>3</sub>Ge<sub>5</sub>
Anisotropic magnetic and transport properties of orthorhombic o-Pr<sub>2</sub>Co<sub>3</sub>Ge<sub>5</sub> Open
The crystal structure, electron energy-loss spectroscopy (EELS), heat capacity, and anisotropic magnetic and resistivity measurements are reported for Sn flux grown single crystals of orthorhombic Pr 2 Co 3 Ge 5 (U 2 Co 3 Si 5 -type, Ibam …
View article: CSD 2189805: Experimental Crystal Structure Determination
CSD 2189805: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2189804: Experimental Crystal Structure Determination
CSD 2189804: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Flux Growth of Cerium Nickel Gallides Studied by In Situ Neutron Diffraction
Flux Growth of Cerium Nickel Gallides Studied by In Situ Neutron Diffraction Open
Reactions of cerium and nickel in excess molten gallium were monitored by neutron diffraction during heating and cooling. The formation of binary intermediates CeGa2 and Ni2Ga3 was observed during heating. During cooling of the molten mixt…