A5092991054- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Magneto-Optical Properties and Applications
- Topological Materials and Phenomena
- Magnetic Field Sensors Techniques
- Multiferroics and related materials
- High-pressure geophysics and materials
- Random lasers and scattering media
Université de Sherbrooke
2023-2024
Abstract The thermal Hall effect has emerged as a potential probe of exotic excitations in spin liquids. In the Kitaev magnet $${{\alpha }}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>α</mml:mi> </mml:math> -RuCl 3 , conductivity $${{{\kappa }}}_{{{xy}}}$$ <mml:msub> <mml:mrow> <mml:mi>κ</mml:mi> </mml:mrow> <mml:mi>x</mml:mi> <mml:mi>y</mml:mi> </mml:msub> been attributed to Majorana fermions, chiral magnons, or phonons. Theoretically, former two types heat carriers...
Y-kapellasite [Y3Cu9(OH)19Cl8] is a frustrated antiferromagnetic insulator which remains paramagnetic down to remarkably low N\'eel temperature of about 2 K. Having studied this material in the regime, phonons are only possible heat carriers, we report observation planar parallel thermal Hall effect coming unambiguously from phonons. This an advantage over Kitaev quantum spin liquid candidates {\alpha}-RuCl3 and Na2Co2TeO6 where principle other carriers can be involved [1-4]. As it happens,...
Kitaev materials are a promising platform for the realization of quantum spin liquid states. The thermal Hall effect has emerged as potential probe exotic excitations within such In candidate material $\alpha$-RuCl$_{3}$, however, conductivity $\kappa_{xy}$ been attributed not only to Majorana fermions or chiral magnons, but also phonons. It shown theoretically that former two types heat carriers can generate "planar" effect, whereby magnetic field is parallel current, observed...
In a growing number of materials, phonons have been found to generate thermal Hall effect, but the underlying mechanism remains unclear. Inspired by previous studies that revealed importance Tb$^{3+}$ ions in generating effect Tb$_{2}$Ti$_{2}$O$_{7}$, we investigated role Tm$^{3+}$ TmVO$_{4}$, paramagnetic insulator with different crystal structure. We observe negative conductivity TmVO$_{4}$ magnitude such angle, $|\kappa_{xy}$/$\kappa_{xx}|$, is approximately 1 x 10$^{-3}$ at $H$ = 15 T...