Daniel P. Shoemaker
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View article: Signatures of Kramers-Weyl fermions in the charge density wave material (TaSe4)2I
Signatures of Kramers-Weyl fermions in the charge density wave material (TaSe4)2I Open
The quasi-one-dimensional charge density wave (CDW) material (TaSe4)2I has been recently predicted to host Kramers-Weyl (KW) fermions which should exist in the vicinity of high symmetry points in the Brillouin zone in chiral materials with…
View article: Applied-field magnetic structure and spectroscopy shifts of the effective spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>X</mml:mi><mml:mi>Y</mml:mi></mml:mrow></mml:math>-like magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Li</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CoCl</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>
Applied-field magnetic structure and spectroscopy shifts of the effective spin- -like magnet Open
Insulators containing chains of magnetic transition metal cations provide platforms for probing spin-$\frac{1}{2}$ dynamics and quantum critical behavior. Li$_2$CoCl$_4$ contains edge-sharing CoCl$_6$ octahedra that form chains along the c…
View article: Topological phase transition from optical manipulation of chiral response in the one-dimensional correlated Weyl semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>TaS</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant="normal">I</mml:mi></mml:mrow></mml:math>
Topological phase transition from optical manipulation of chiral response in the one-dimensional correlated Weyl semimetal Open
View article: Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I
Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I Open
The charge density wave in (TaSe4)2I has drawn much attention recently as a controversial candidate for an axion insulator where the CDW breaks the chiral symmetry of the Weyl semimetal. Here we use ultrafast x-ray scattering to study the …
View article: Observation of a dynamic magneto-chiral instability in photoexcited tellurium
Observation of a dynamic magneto-chiral instability in photoexcited tellurium Open
In a system of charged chiral fermions driven out of equilibrium, an electric current parallel to the magnetic field can generate a dynamic instability by which electromagnetic waves become amplified. Whether a similar instability can occu…
View article: High-pressure characterization of Ag3AuTe2: Implications for strain-induced band tuning
High-pressure characterization of Ag3AuTe2: Implications for strain-induced band tuning Open
Recent band structure calculations have suggested the potential for band tuning in the chiral semiconductor Ag3AuTe2 to zero upon application of negative strain. In this study, we report on the synthesis of polycrystalline Ag3AuTe2 and inv…
View article: Magnetic anisotropy in single-crystalline antiferromagnetic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Au</mml:mi></mml:mrow></mml:math>
Magnetic anisotropy in single-crystalline antiferromagnetic Open
Multiple recent studies have identified the metallic antiferromagnet Mn2Au to be a candidate for spintronic applications due to apparent in-plane anisotropy, preserved magnetic properties above room temperature, and current-ind…
View article: Unconventional Spectral Gaps Induced by Charge Density Waves in the Weyl Semimetal (TaSe<sub>4</sub>)<sub>2</sub>I
Unconventional Spectral Gaps Induced by Charge Density Waves in the Weyl Semimetal (TaSe<sub>4</sub>)<sub>2</sub>I Open
Coupling Weyl quasiparticles and charge density waves (CDWs) can lead to fascinating band renormalization and many-body effects beyond band folding and Peierls gaps. For the quasi-one-dimensional chiral compound (TaSe4)2
View article: Unique structure type and antiferromagnetic ordering in semiconducting Eu2InSnP3
Unique structure type and antiferromagnetic ordering in semiconducting Eu2InSnP3 Open
The multitude of bonding motifs that can arise from the main group elements in pnictides leads to ternary compounds with rare earths that span insulating and metallic behavior, layered and channeled compounds, and ferrimagnetic and antifer…
View article: High-pressure characterization of Ag$_3$AuTe$_2$: Implications for strain-induced band tuning
High-pressure characterization of Ag$_3$AuTe$_2$: Implications for strain-induced band tuning Open
Recent band structure calculations have suggested the potential for band tuning in a chiral semiconductor, Ag$_3$AuTe$_2$, to zero upon application of negative strain. In this study, we report on the synthesis of polycrystalline Ag$_3$AuTe…
View article: Synthesis of layered gold tellurides AuSbTe and Au$_2$Te$_3$ and their semiconducting and metallic behavior
Synthesis of layered gold tellurides AuSbTe and Au$_2$Te$_3$ and their semiconducting and metallic behavior Open
Previous studies on natural samples of pampaloite (AuSbTe) revealed the crystal structure of a potentially cleavable and/or exfoliable material, while studies on natural and synthetic montbrayite (Sb-containing Au$_2$Te$_3$) claimed variou…
View article: Magnetic anisotropy in single-crystalline antiferromagnetic Mn$_2$Au
Magnetic anisotropy in single-crystalline antiferromagnetic Mn$_2$Au Open
Multiple recent studies have identified the metallic antiferromagnet Mn$_2$Au to be a candidate for spintronic applications due to apparent in-plane anisotropy, preserved magnetic properties above room temperature, and current-induced Néel…
View article: Spin-resolved topology and partial axion angles in three-dimensional insulators
Spin-resolved topology and partial axion angles in three-dimensional insulators Open
Symmetry-protected topological crystalline insulators (TCIs) have primarily been characterized by their gapless boundary states. However, in time-reversal- ( $${{{{{{{\mathcal{T}}}}}}}}$$ -) invariant (helical) 3D TCIs—termed higher-orde…
View article: CSD 2312751: Experimental Crystal Structure Determination
CSD 2312751: 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: Design rules, accurate enthalpy prediction, and synthesis of stoichiometric Eu3+ quantum memory candidates
Design rules, accurate enthalpy prediction, and synthesis of stoichiometric Eu3+ quantum memory candidates Open
Stoichiometric Eu3+ compounds have recently shown promise for building dense, optically addressable quantum memory as the cations’ long nuclear spin coherence times and shielded 4f electron optical transitions provide reliable memory platf…
View article: Design rules, accurate enthalpy prediction, and synthesis of stoichiometric Eu3+ quantum memory candidates
Design rules, accurate enthalpy prediction, and synthesis of stoichiometric Eu3+ quantum memory candidates Open
Stoichiometric Eu3+ compounds have recently shown promise for building dense, optically addressable quantum memory as the cations’ long nuclear spin coherence times and shielded 4f electron optical transitions provide reliable memory platf…
View article: An exfoliable transition metal chalcogenide semiconductor NbSe2I2
An exfoliable transition metal chalcogenide semiconductor NbSe2I2 Open
As the field of exfoliated van der Waals electronics grows to include complex heterostructures, the variety of available in-plane symmetries and geometries becomes increasingly valuable. In this work, we present an efficient chemical vapor…
View article: An exfoliable transition metal chalcogenide semiconductor NbSe2I2
An exfoliable transition metal chalcogenide semiconductor NbSe2I2 Open
As the field of exfoliated van der Waals electronics grows to include complex heterostructures, the variety of available in-plane symmetries and geometries becomes increasingly valuable. In this work, we present an efficient chemical vapor…
View article: Zero-field magnetic structure and metamagnetic phase transitions of the cobalt chain compound Li$_2$CoCl$_4$
Zero-field magnetic structure and metamagnetic phase transitions of the cobalt chain compound Li$_2$CoCl$_4$ Open
Exploring the uncharacterized magnetic phases of Co$^{2+}$ chain compounds is critical for finding new low-dimensional magnets hosting quantized excitations. We map the unexplored magnetic phases of the Co$^{2+}$ chain compound Li$_2$CoCl$…
View article: CSD 2247474: Experimental Crystal Structure Determination
CSD 2247474: 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: Data from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity
Data from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity Open
Maturation of human natural killer (NK) cells as defined by accumulation of cell-surface expression of CD57 is associated with increased cytotoxic character and TNF and IFNγ production upon target-cell recognition. Notably, multiple studie…
View article: Data from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity
Data from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity Open
Maturation of human natural killer (NK) cells as defined by accumulation of cell-surface expression of CD57 is associated with increased cytotoxic character and TNF and IFNγ production upon target-cell recognition. Notably, multiple studie…
View article: Supplemental Figures 1-6 from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity
Supplemental Figures 1-6 from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity Open
This supplementary file contains Supplemental Figures 1-6. Supplemental Figure 1 shows that 7-day ex vivo culture of NK cells with IL-15 and 5 μM CHIR99021 leads to an increase in the frequencies of NK cells with heterogeneous adaptive NK …
View article: Supplemental Figures 1-6 from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity
Supplemental Figures 1-6 from GSK3 Inhibition Drives Maturation of NK Cells and Enhances Their Antitumor Activity Open
This supplementary file contains Supplemental Figures 1-6. Supplemental Figure 1 shows that 7-day ex vivo culture of NK cells with IL-15 and 5 μM CHIR99021 leads to an increase in the frequencies of NK cells with heterogeneous adaptive NK …
View article: Observation of a massive phason in a charge-density-wave insulator
Observation of a massive phason in a charge-density-wave insulator Open
View article: Stacking sequences of coherent EuAl3(BO3)4 polymorphs define local Eu3+ symmetry and control access to quantum information storage
Stacking sequences of coherent EuAl3(BO3)4 polymorphs define local Eu3+ symmetry and control access to quantum information storage Open
Stoichiometric rare-earth materials have demonstrated extremely narrow inhomogeneous photoluminescence-excitation linewidths because the rare-earth cations occupy uniform crystallographic sites. These narrow linewidths make them strong can…
View article: Angstrom-Scale Imaging of Magnetization in Antiferromagnetic Fe$_2$As via 4D-STEM
Angstrom-Scale Imaging of Magnetization in Antiferromagnetic Fe$_2$As via 4D-STEM Open
We demonstrate a combination of computational tools and experimental 4D-STEM methods to image the local magnetic moment in antiferromagnetic Fe$_2$As with 6 angstrom spatial resolution. Our techniques utilize magnetic diffraction peaks, co…
View article: CSD 2215551: Experimental Crystal Structure Determination
CSD 2215551: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Observation of the massive Lee-Fukuyama phason in a charge density wave insulator
Observation of the massive Lee-Fukuyama phason in a charge density wave insulator Open
The lowest-lying fundamental excitation of an incommensurate charge density wave (CDW) material is widely believed to be a massless phason -- a collective modulation of the phase of the CDW order parameter. However, as first pointed out by…
View article: A new quasi-one-dimensional transition metal chalcogenide semiconductor (Nb$_4$Se$_{15}$I$_2$)I$_2$
A new quasi-one-dimensional transition metal chalcogenide semiconductor (Nb$_4$Se$_{15}$I$_2$)I$_2$ Open
The discovery of new low-dimensional transition metal chalcogenides is contributing to the already prosperous family of these materials. In this study, needle-shaped single crystals of a new quasi-one-dimensional material (Nb$_4$Se$_{15}$I…