A5001126517- Rare-earth and actinide compounds
- Iron-based superconductors research
- Magnetic and transport properties of perovskites and related materials
- Inorganic Chemistry and Materials
- Magnetic Properties of Alloys
- Solid-state spectroscopy and crystallography
- Advanced NMR Techniques and Applications
- Advanced Thermoelectric Materials and Devices
- Crystallization and Solubility Studies
- Phase-change materials and chalcogenides
- Advanced Condensed Matter Physics
- Magnetic Properties and Applications
- X-ray Diffraction in Crystallography
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Chalcogenide Semiconductor Thin Films
- Microstructure and Mechanical Properties of Steels
- Crystal Structures and Properties
University of California, Davis
2017-2024
University of California System
2020-2021
SHIELDS for Families
2020
Amorphous selenium, owing to its tremendous technological importance and perhaps chemical simplicity, has been studied for nearly a century yet an unequivocal structural description of this material remains lacking date. The primary controversy regarding the structure amorphous Se relates relative fraction atoms residing in ∞1Se chains versus Se8 rings. Herein we present results two-dimensional solid-state 77 nuclear magnetic resonance (NMR) spectroscopic study chain ring crystalline...
Unconventional superconductors have Cooper pairs with lower symmetries than in conventional superconductors. In most unconventional superconductors, the additional symmetry breaking occurs relation to typical ingredients such as strongly correlated Fermi liquid phases, magnetic fluctuations, or strong spin-orbit coupling noncentrosymmetric structures. this article, we show that time-reversal superconductor LaNiGa$_2$ is enabled by its previously unknown topological electronic band structure....
We present nuclear magnetic (NMR) and quadrupole (NQR) resonance magnetization data in the normal state of topological crystalline superconductor ${\mathrm{LaNiGa}}_{2}$. find no evidence significant fluctuations or enhanced paramagnetism. These results suggest that time-reversal symmetry breaking previously reported superconducting this material is not driven by strong electron correlations.
We report the synthesis, structure, and magnetic properties of a new Zintl phase structure type, Eu11Zn4Sn2As12. The composition this have been established by single-crystal X-ray diffraction electron microprobe analysis. Eu11Zn4Sn2As12 crystallizes in monoclinic space group C2/c (No. 15) with following lattice parameters: = 7.5679(4) Å, b 13.0883(6) c 31.305(2) β 94.8444(7)° [R1 0.0398; wR2 0.0633 (all data)]. anisotropic structural features staggered ethane-like [Sn2As6]12– units infinite...
Abstract Amorphous selenium, owing to its tremendous technological importance and perhaps chemical simplicity, has been studied for nearly a century yet an unequivocal structural description of this material remains lacking date. The primary controversy regarding the structure amorphous Se relates relative fraction atoms residing in chains versus 8 rings. Herein we present results two‐dimensional solid‐state 77 nuclear magnetic resonance (NMR) spectroscopic study chain ring crystalline...
We combine structural and magnetic measurements to compare the different phase diagrams between pressure substitution studies in ${\mathrm{CeTiGe}}_{3}$. report on structural, magnetic, electrical transport properties of single crystals ${\mathrm{CeTi}}_{1\ensuremath{-}x}{\mathrm{V}}_{x}{\mathrm{Ge}}_{3}$ ($x=0$, 0.1, 0.2, 0.3, 0.4, 0.9, 1), polycrystalline samples ($x=0.5$, 0.6, 0.7, 0.8), as well ${\mathrm{CeTiGe}}_{3}$ under up $9\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$. The...
We report $^{77}\mathrm{Se}$ NMR data in the normal and superconducting states of a single crystal FeSe for several different field orientations. The Knight shift is suppressed state in-plane fields, but does not vanish at zero temperature. For fields oriented out plane, little or no reduction observed below ${T}_{c}$. These results reflect spin-singlet pairing emerging from nematic with large orbital susceptibility spin-orbit coupling. spectra spin-relaxation rate reveal electronic...
The ${\mathrm{Ce}}_{m}{\mathrm{M}}_{n}{\mathrm{In}}_{3m+2n}$ $(m=1,2;n=0,1)$ family has been one of the most studied families heavy fermion compounds. This revealed many interesting low-temperature physics phenomena, like quantum critical points, superconductivity, and non-Fermi liquid behavior, when these materials are exposed to pressure, magnetic fields, and/or chemical substitution. Here we provide a thorough investigation...
Magnetization measurements on the itinerant ferromagnet LaCrSb${}_{3}$ as a function of chemical substitution show quantum tricritical point is avoided along with appearance new magnetic phase.
We present nuclear magnetic (NMR) and qudrupole (NQR) resonance magnetization data in the normal state of topological crystalline superconductor LaNiGa$_2$. find no evidence fluctuations or enhanced paramagnetism. These results suggest that time-reversal symmetry breaking previously reported superconducting this material is not driven by strong electron correlations.
The experimental characterization of materials under high pressure is often limited to a few properties. Usually, this insufficient for detailed understanding the underlying physics. Here, authors report suite high-pressure experiments probing ferromagnetic state in LaCrSb${}_{3}$. They assess Curie temperature, crystal structure, and evolution magnetic moment as obtained from integrated absolute difference x-ray emission spectroscopy. temperature appears be driven by Cr moment, which...
FeAs<sub>2−x</sub>Se<sub>x</sub> exhibits structural transition at <italic>x</italic> = 0.65, and a low lattice thermal conductivity (0.22 W m<sup>−1</sup> K<sup>−1</sup>) 0.5.
Correction for ‘Measured and simulated thermoelectric properties of FeAs<sub>2−x</sub>Se<sub>x</sub> (<italic>x</italic> = 0.30–1.0): from marcasite to arsenopyrite structure’ by Christopher J. Perez <italic>et al.</italic>, <italic>Mater. Adv.</italic>, 2020, <bold>1</bold>, 1390–1398, DOI: 10.1039/D0MA00371A.