A5072466335- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Muon and positron interactions and applications
- Advancements in Battery Materials
- Semiconductor materials and devices
- Iron-based superconductors research
- Catalysis and Oxidation Reactions
- Magnetic and transport properties of perovskites and related materials
- Copper-based nanomaterials and applications
- Transition Metal Oxide Nanomaterials
- Ammonia Synthesis and Nitrogen Reduction
- Semiconductor materials and interfaces
- Chalcogenide Semiconductor Thin Films
- Plasma Diagnostics and Applications
- Catalytic Processes in Materials Science
- Silicon Carbide Semiconductor Technologies
Northern Michigan University
2019-2024
Simon Fraser University
2022-2023
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...
The local magnetic susceptibility of the spin-triplet superconductor UTe$_2$ has been investigated by positive muon ($\mu^+$) Knight shift measurements in normal state. Three distinct $\mu^+$ components are observed for a field applied parallel to $c$ axis. Two these exhibit breakdown linear relationship with bulk ($\chi$) below temperature $T^* \! \sim 30$ K, which points gradual emergence correlated Kondo liquid. Below $T_{\rm r} 12$ K linearity is gradually restored, indicating partial...
First-principles calculations were performed jointly with muon-spin (μSR) spectroscopy experiments in order to examine the electrical activity of hydrogen mixed-cation chalcopyrite Cu(In1−x,Gax)Se2 (CIGS) alloys and other related compounds commonly used as absorbers solar-cell technology. The study targeted range Ga concentrations most relevant typical solar cells. By means a hybrid-functional approach charge-transition levels determined evolution defect pinning level, E(+/–), was monitored...
We have applied the photoexcited muon spin spectroscopy technique (photo-$\mu$SR) to intrinsic germanium with goal of developing a new method for characterizing excess carrier kinetics in wide range semiconductors. Muon relaxation rates can be unique measure density and utilized investigate dynamics. The obtained lifetime spectrum modeled simple diffusion equation determine bulk recombination mobility. Temperature dependent studies these parameters reveal mechanism.
Muonium (Mu), a pseudoisotope of hydrogen with positively charged muon in place the proton, takes form <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msup><a:mrow><a:mi>Mu</a:mi></a:mrow><a:mrow><a:mo>+</a:mo><a:mo>,</a:mo><a:mn>0</a:mn><a:mo>,</a:mo><a:mo>−</a:mo></a:mrow></a:msup></a:math> (like isolated hydrogen, i.e., <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:msup><b:mrow><b:mi...
Positive muons can be implanted into silicon carbide (SiC), where they model the isolated hydrogen defect in negative, neutral, or positive charge states and act as either an acceptor a donor with midgap energy levels [Lichti et al., Phys. Rev. B 70, 165204 (2004); Lichti Lett. 101, 136403 (2008)]. The evolve after implantation depending on temperature material doping. We have measured optically induced effects 6H-SiC using pulsed, tunable laser [Yokoyama Sci. Instrum. 87, 125111 (2016)]. In...
Abstract In most superconductors electrons form Cooper pairs in a spin-singlet state mediated by either quantum of energy from crystal lattice vibration (phonon) or long-range interactions such as spin fluctuations. The novel superconductor UTe 2 is rare material wherein unique spin-triplet with potential topological properties. Theoretically, superconductivity may be explained terms pairing ferromagnetic antiferromagnetic Experimentally, the magnetic properties remain enigmatic. Here we...