A5074174077- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Cold Atom Physics and Bose-Einstein Condensates
- Perovskite Materials and Applications
- Inorganic Chemistry and Materials
Tohoku University
2022-2024
The present studies show that long-range magnetic order takes place in ${\mathrm{RuBr}}_{3}$ at $\ensuremath{\approx}34$ K. observations of clear oscillations the muon time spectra demonstrate presence well-defined internal fields sites. ordering appears to be very robust and static, suggesting a more conventional nature system zero field. Present investigations prove Kitaev interactions are likely weakened field comparison $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{RuCl}}_{3}$...
We investigate electronic properties of solid solution $\mathrm{Ru}{({\mathrm{Br}}_{1\ensuremath{-}x}{\mathrm{I}}_{x})}_{3}$ with honeycomb structure which bridges the spin-orbit-entangled Mott insulator ${\mathrm{RuBr}}_{3}$ and strongly electron-correlated semimetal ${\mathrm{RuI}}_{3}$. find a first-order insulator-metal transition at $x\ensuremath{\sim}0.85$ triggered by increased $d\text{\ensuremath{-}}p$ hybridization formation interlayer I--I bonds. also observe switching magnetic...
The recent synthesis of ruthenium trihalides Ru$X_3$ ($X$ = Cl, Br, I) has enlarged the set material candidates for Kitaev spin liquid. realization model necessitates formation $J=1/2$ pseudospins in octahedral crystal field. We use Ru $L_3$-edge resonant inelastic x-ray scattering to investigate evolution multiplet structures Ru$X_3$. identified quasi-elastic magnetic correlations and spin-orbit transitions $J=3/2$ states without discernible trigonal splitting, thereby validating...
$\mathrm{Ru}{X}_{3}$ trihalides ($\mathit{X}=\text{halogen atoms}$) offer a prominent platform for exploring the Kitaev spin liquid. Using polarization-resolved Raman spectroscopy, we report comparative study of lattice, magnetic, and electronic excitations on $\mathit{X}=\text{Cl}$ Br. Our phonon spectra show that ${\mathrm{RuBr}}_{3}$ retains three-layer honeycomb lattice without structural transition, unlike $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{RuCl}}_{3}$ undergoes...
The present studies show that long-range magnetic order takes place in RuBr$_3$ at $\approx$ 34 K. observations of clear oscillations the muon time spectra demonstrate presence well-defined internal fields sites. ordering appears to be very robust and static suggesting a more conventional nature system zero field. Present investigations prove Kitaev interactions are likely weakened field comparison $\alpha$-RuCl$_3$ system. This proves it is possible tune by replacing Cl with heavier halogen...