Spectral weight of resonant inelastic X-ray scattering in doped cuprates: Effect of core-hole lifetime
Spectral weight of resonant inelastic X-ray scattering in doped cuprates: Effect of core-hole lifetime
复制标题
掺杂铜酸盐中共振非弹性 X 射线散射的谱权：芯孔寿命的影响
DOI：
10.1142/s0217979218400179
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发表时间：
2018
影响因子：
1.7
通讯作者：
T. Tohyama and K. Tsutsui
中科院分区：
文献类型：
--
作者：
F. Komori;S. Kim;Y. Ishida;S. Yoshizawa;S. Shin;K. Eto;K. Segawa;and Y. Ando;T. Tohyama and K. Tsutsui
研究了芯孔寿命对掺杂铜酸盐中共振非弹性x射线散射（RIXS）谱权的影响。我们利用精确对角化技术计算了4 × 4掺杂Hubbard晶格的谱权，发现检测单磁振子激发的自旋翻转通道对核孔寿命的敏感性较低，而在非自旋翻转通道中，谱权强烈依赖于寿命。在后一种情况下，电荷和双磁振子激发分别对短寿命和长寿命的RIXS起主要作用。当入射光子能量调谐到x射线吸收光谱的主峰时，期望电荷和双磁振子激发都有助于RIXS中的非自旋翻转通道。
We examine the effect of core-hole lifetime on the spectral weight of resonant inelastic X-ray scattering (RIXS) in hole-doped cuprates. We calculate the spectral weight by using the exact diagonalization technique for a 4 × 4 doped Hubbard lattice and find that the spin-flip channel detecting single-magnon excitation is less sensitive to the core-hole lifetime while in the non-spin-flip channel the spectral weight is strongly dependent on the lifetime. In the latter, charge and two-magnon excitations predominately contribute to RIXS for short and long core-hole lifetimes, respectively. For a realistic value of the core-hole lifetime in cuprates, both the charge and two-magnon excitations are expected to contribute to the non-spin-flip channel in RIXS when the incident-photon energy is tuned to the main peak of X-ray absorption spectrum.