Fermi-surface selective determination of the g -factor anisotropy in URu 2 Si 2
作者： Gaël Bastien , Dai Aoki , Gérard Lapertot , Jean-Pascal Brison , Jacques Flouquet
DOI: 10.1103/PHYSREVB.99.165138
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摘要: The $g$-factor anisotropy of the heavy quasiparticles in hidden order state ${\mathrm{URu}}_{2}{\mathrm{Si}}_{2}$ has been determined from superconducting upper critical field and microscopically Shubnikov--de Haas (SdH) oscillations. We present a detailed analysis $g$ factor for $\ensuremath{\alpha}, \ensuremath{\beta}$, $\ensuremath{\gamma}$ Fermi-surface pockets. Our results suggest strong between $c$ axis basal plane all observed quantum oscillations is good agreement with at low temperatures, which strongly limited by paramagnetic pair breaking along easy magnetization $c$. However, initial slope near ${T}_{c}$ cannot be explained effective masses Fermi velocities derived
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