A5089793655- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Topological Materials and Phenomena
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- High-pressure geophysics and materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetic Properties of Alloys
- Electronic and Structural Properties of Oxides
- Inorganic Chemistry and Materials
- Advanced Chemical Physics Studies
- Electronic Health Records Systems
- Nuclear Materials and Properties
- Advanced Thermoelectric Materials and Devices
- Magnetic properties of thin films
- Healthcare Systems and Technology
- Thermodynamic and Structural Properties of Metals and Alloys
- Radioactive element chemistry and processing
- Graphene research and applications
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Healthcare Technology and Patient Monitoring
- Aluminum Alloys Composites Properties
Los Alamos National Laboratory
2017-2025
University of California, San Diego
2023-2025
University of California, Irvine
2013-2017
Ecological Society of America
2017
Duke University Hospital
2012
Duke Medical Center
2012
United States Army Medical Command
2012
Queen's Medical Center
2006-2008
University of Hawaiʻi at Mānoa
2003-2008
Epic Systems (United States)
2008
A topological insulator (TI) is an unusual quantum state in which the insulating bulk topologically distinct from vacuum, resulting a unique metallic surface that robust against time-reversal invariant perturbations. These transport properties, however, remains difficult to be isolated existing TI crystals (Bi2Se3, Bi2Te3 and Sb2Te3) due impurity caused conduction. We report large of Kondo (TKI) candidate material SmB6 thickness-independent Hall effects non- local transport, are...
UTe2 is a newly-discovered unconventional superconductor wherein multicomponent topological superconductivity anticipated based on the presence of two superconducting transitions and time-reversal symmetry breaking in state. The observation transitions, however, remains controversial. Here we demonstrate that single crystals displaying an optimal transition temperature at 2 K exhibit remarkably high quality supported by their small residual heat capacity state large resistance ratio. Our...
Abstract In most superconductors electrons form Cooper pairs in a spin-singlet state mediated by either phonons or long-range interactions such as spin fluctuations. The superconductor UTe 2 is rare material wherein are believed to unique spin-triplet with potential topological properties. While pairing may be ferromagnetic antiferromagnetic fluctuations, experimentally, the magnetic properties of unclear. By way muon rotation/relaxation (μSR) measurements on independently grown single...
Thickness driven electronic phase transitions are broadly observed in different types of functional perovskite heterostructures. However, uncertainty remains whether these effects solely due to spatial confinement, broken symmetry or rather a change structure with varying film thickness. Here, we present direct evidence for the relaxation oxygen 2p and Mn 3d orbital (p-d) hybridization coupled layer dependent octahedral tilts within La2/3Sr1/3MnO3 by interfacial coupling. An enhanced Curie...
We present magnetotransport data on the ferrimagnet GdMn$_6$Sn$_6$. From temperature dependent we are able to extract a large instrinsic contribution anomalous Hall effect $\sigma_{xz}^{int} \sim$ 32 $\Omega^{-1}cm^{-1}$ and $\sigma_{xy}^{int} 223 $\Omega^{-1}cm^{-1}$, which is comparable values found in other systems also containing kagome nets of transition metals. our transport anisotropy, as well density functional theory calculations, argue that system electronically best described...
Abstract Here we investigate antiferromagnetic Eu 5 In 2 Sb 6 , a nonsymmorphic Zintl phase. Our electrical transport data show that is remarkably insulating and exhibits an exceptionally large negative magnetoresistance, which consistent with the presence of magnetic polarons. From ab initio calculations, paramagnetic state topologically nontrivial semimetal within generalized gradient approximation (GGA), whereas trivial topological indices obtained using modified Becke−Johnson potential....
The newly discovered superconductor $\mathrm{U}{\mathrm{Te}}_{2}$ is a strong contender for topological spin-triplet state wherein multicomponent order parameter arises from two nearly degenerate superconducting states. A key issue whether both of these states intrinsically exist at ambient pressure. Through thermal expansion and calorimetry, we show that conditions exhibits detectable transitions only in some samples, the size jump each transition varies when measurement performed different...
Topological superconductivity is a long-sought state of matter in bulk materials, and the odd-parity superconductor UTe2 prime candidate. The recent observation field-trainable spontaneous Kerr signal at onset provides strong evidence that superconducting order parameter multicomponent breaks time-reversal symmetry. Here, we perform effect measurements on number samples—grown via both chemical vapor transport molten-salt-flux methods—that show single transition between 1.6 K 2.1 K. Our...
We have investigated the low-temperature local magnetic properties in bulk of molten salt-flux (MSF)-grown single crystals candidate odd-parity superconductor UTe2 by zero-field muon spin relaxation (μSR). In contrast to previous μSR studies grown a chemical vapor transport method, we find no evidence clusters or electronic moments fluctuating slow enough cause discernible asymmetry spectrum. Consequently, our measurements on MSF-grown rule out generation spontaneous fields that would occur...
Strongly correlated Kondo insulator SmB6 is known for its peculiar low temperature residual conduction, which has recently been demonstrated to arise from a robust metallic surface state, as predicted by the theory of topological (TKI). Photoemission, quantum oscillation and magnetic doping experiments have provided evidence Dirac-like dispersion protection. Questions whether signatures spin-momentum locking electron interaction could be resolved in transport measurements. Here we report...
Odd-parity superconductor ${\mathrm{UTe}}_{2}$ shows spontaneous time-reversal symmetry breaking and multiple superconducting phases, which imply chiral superconductivity, but only in a subset of samples. Here we microscopically observe homogeneous superfluid density ${n}_{s}$ on the surface an enhanced transition temperature near edges. We also detect vortex-antivortex pairs even at zero magnetic field, indicating existence hidden internal field. The dependence ${n}_{s}$, determined...
The $3{d}^{7}\phantom{\rule{4pt}{0ex}}{\mathrm{Co}}^{2+}$-based insulating magnet ${\mathrm{Na}}_{2}{\mathrm{Co}}_{2}{\mathrm{TeO}}_{6}$ has recently been reported to have strong Kitaev interactions on a honeycomb lattice and is thus being considered as quantum spin liquid candidate. However, due the existence of other types interactions, spontaneous long-range magnetic order occurs. This suppressed by applied fields leading succession phases ultimately saturation moments. precise phase...
Abstract Purpose While treatment modalities for Maisonneuve fractures involving the proximal third of fibula are established, no studies to date have reported outcomes associated with syndesmotic-only fixation middle fibular shaft fractures. The purpose this study was evaluate in fibula. Methods A retrospective review conducted on 257 cases syndesmotic ankle instability at a level 1 trauma center between 2013 and 2023. Patients were divided into cohorts based fracture location proximal,...
The development of Kondo lattice coherence in UTe2 leads to the formation a heavy Fermi-liquid state from which superconductivity emerges at lower temperature. In systems, nuclear magnetic resonance (NMR) and muon (μ+) Knight shift have proven be particularly sensitive properties developing heavy-electron fluid. Here we report μ+ measurements on high-quality single crystals grown by molten salt-flux method. Together with previous data crystal chemical-vapor transport method, our results show...
The development of Kondo lattice coherence in UTe2 leads to the formation a heavy Fermi liquid state from which superconductivity emerges at lower temperature. In systems, nuclear magnetic resonance (NMR) and muon Knight shift have proven be particularly sensitive properties developing heavy-electron fluid. Here we report measurements on high-quality single crystals grown by molten salt-flux method. Together with previous data crystal chemical-vapor transport method, our results show...
Introducing the concept of topology into material science has sparked a revolution from classic electronic and optoelectronic devices to topological quantum devices. The latter potential for transferring energy information with unprecedented efficiency. Here, we demonstrate diode effect on surface three-dimensional material, SmB <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:msub> <mml:mrow/> <mml:mn>6</mml:mn> </mml:msub> </mml:math> ,...
In the non-collinear antiferromagnet Mn3Sn, we compare simultaneous measurements of anomalous Hall effect (AHE) and magneto-optical Kerr (MOKE) through two magnetic phase transitions: high-temperature paramagnetic/antiferromagnetic (AF) transition at Néel temperature (TN ≈ 420 K) a lower-temperature incommensurate ordering T1 270 K. While both AHE MOKE are sensitive to same underlying symmetries AF spin order, find that temperatures measured by these techniques unexpectedly differ...
Abstract Unusual magnetic textures can be stabilized in f -electron materials due to the interplay between competing interactions, complex Fermi surfaces, and crystalline anisotropy. Here we investigate CeAuSb 2 , an incommensurate antiferromagnet hosting both single- Q double- spin as a function of fields ( H ) applied along c axis. Experimentally, map out field-temperature phase diagram via electrical resistivity thermal expansion measurements. Supported by calculations Kondo lattice...
We report anisotropic resistivity measurements of the heavy-fermion superconductor CeRh$_2$As$_2$ in magnetic fields up to 16 T and temperatures down 0.35 K. The measured shows a signature corresponding suggested quadrupole density wave order state at $T_0 \sim$ 0.5 K for both directions. For field applied along tetragonal $a$ axis, $T_0$ is enhanced with reaching $\sim$1.75 T. Further, field-induced transition occurs $B_m \sim $ 8.1 change new broken symmetry state. $c$ suppressed below our...