论文标题
双重perovskite中的磁激发la $ _ {2} $ _ {2} $ \ MATHIT {M} $ iro $ $ _ {6} $（$ \ MATHIT {M} $ = CO，Ni和Zn）由3 $ \ Mathit {D $ \ Mathit {D}
Magnetic excitations in double perovskite iridates La$_{2}$$\mathit{M}$IrO$_{6}$ ($\mathit{M}$ = Co, Ni, and Zn) mediated by 3$\mathit{d}$-5$\mathit{d}$ hybridization
论文作者
论文摘要
通过在IR $ \ Mathit {l _ {\ Mathrm {3}}} $ edge上执行谐振非弹性X射线散射（RIX）测量，我们已经调查了一系列双重perovskite单晶的低能基本激动（$ \ Mathit {M} $ = CO，Ni和Zn）。在包含磁性3 $ \ mathit {d} $ ions，la $ _ {2} $ coiro $ _ {6} $ {6} $ {6} $和la $ _ $ _ {2 $ _ {2} $ nii $ ___的$ nii $ ______________________________________________________________________________________6 $} $ 42（6）MeV和$ \ sim $ 35（5）MeV中几乎无分散的磁激发。 In contrast, this low-energy magnetic excitation is absent in La$_{2}$ZnIrO$_{6}$ in which the 3$\mathit{d}$ ions are non-magnetic, suggesting the importance of 3$\mathit{d}$-5$\mathit{d}$ hybridization in the magnetic properties of these double perovskite iridates.磁激发被完全抑制在磁性排序温度之上，这表明使用简单的自旋哈密顿量描述这些材料的磁性不足。
By performing resonant inelastic x-ray scattering (RIXS) measurements at the Ir $\mathit{L_{\mathrm{3}}}$ edge, we have investigated the low-energy elementary excitations in a series of double perovskite iridate single crystals, La$_{2}$$\mathit{M}$IrO$_{6}$ ($\mathit{M}$ = Co, Ni, and Zn). Almost dispersionless magnetic excitations at $\sim$ 42(6) meV and $\sim$ 35(5) meV have been observed in crystals containing magnetic 3$\mathit{d}$ ions, La$_{2}$CoIrO$_{6}$ and La$_{2}$NiIrO$_{6}$, respectively. In contrast, this low-energy magnetic excitation is absent in La$_{2}$ZnIrO$_{6}$ in which the 3$\mathit{d}$ ions are non-magnetic, suggesting the importance of 3$\mathit{d}$-5$\mathit{d}$ hybridization in the magnetic properties of these double perovskite iridates. The magnetic excitation is suppressed completely above the magnetic ordering temperature, suggesting the inadequacy of using a simple spin Hamiltonian to describe magnetism of these materials.
