Magnetism in the Kitaev quantum spin liquid candidate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>RuBr</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
Till J. Weinhold, Chennan Wang, F. Seewald, Vadim Grinenko, Y. Imai, Fuki Sato, Kenya Ohgushi, H.‐H. Klauß, Rajib Sarkar
Abstract
The present studies show that long-range magnetic order takes place in ${\mathrm{RuBr}}_{3}$ at $\ensuremath{\approx}34$ K. The observations of clear oscillations in the muon time spectra demonstrate the presence of well-defined internal fields at the muon sites. The magnetic ordering appears to be very robust and static, suggesting a more conventional nature of magnetic ordering in the ${\mathrm{RuBr}}_{3}$ system at zero field. Present investigations prove that in ${\mathrm{RuBr}}_{3}$ the Kitaev interactions are likely to be weakened at zero field in comparison to the $\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{RuCl}}_{3}$ system. This proves that it is possible to tune the Kitaev interactions by replacing Cl with heavier halogen elements such as Br.