A5048829739- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Inorganic Chemistry and Materials
- Advanced Chemical Physics Studies
- Nuclear Materials and Properties
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
Simon Fraser University
2023-2025
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...
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...
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...
We report muon-spin rotation ($\ensuremath{\mu}\mathrm{SR}$) measurements of the temperature dependence absolute value magnetic penetration depth and field vortex core size in mixed state nonsymmorphic superconductor ${\mathrm{LaNiGa}}_{2}$. The superfluid density is shown to be well described by a two-band model with strong interband coupling. Consistent coupling superconducting condensates two different bands, we show that resembles single-band superconductor. Our results lend support...
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...
We report muon spin rotation (muSR) measurements of the temperature dependence absolute value magnetic penetration depth and field vortex core size in mixed state non-symmorphic superconductor LaNiGa2. The normalized superfluid density is shown to be well described by a two-band model with strong interband coupling. Consistent coupling superconducting condensates two different bands, we show that resembles single-band superconductor. Our results lend support proposal LaNiGa2 fully-gapped,...