论文标题
超精细耦合作为重费材料中轨道各向异性的探针
Hyperfine Couplings as a Probe of Orbital Anisotropy in Heavy Fermion Materials
论文作者
论文摘要
核和电子自旋之间在重费材料材料中转移的超精细相互作用取决于$ f $ - 电子轨道和周围远处核的杂交。在Cemin $ _5 $（M = RH，IR，CO）中，高精细耦合到两个辅助位点以及CE的晶体电场都非常依赖于过渡金属。我们测量一系列CERH $ _ {1-x} $ ir $ _x $ in $ _5 $ crystals，发现超精细耦合反映了基态CE 4 $ f $ savefunction的轨道各向异性。这些发现提供了直接证明，表明该系统中CE-IN平面的杂交主导了静止的过渡。
The transferred hyperfine interaction between nuclear and electron spins in an heavy fermion material depends on the hybridization between the $f$-electron orbitals and those surrounding a distant nucleus. In CeMIn$_5$ (M=Rh, Ir, Co), both the hyperfine coupling to the two indium sites as well as the crystalline electric field at the Ce are strongly dependent on the transition metal. We measure a series of CeRh$_{1-x}$Ir$_x$In$_5$ crystals and find that the hyperfine coupling reflects the orbital anisotropy of the ground state Ce 4$f$ wavefunction. These findings provide direct proof that the localized to itinerant transition is dominated by hybridization out of the Ce-In plane in this system.
