论文标题
掺杂的一维抗铁磁铁的接管和旋转动力学的下一个最新邻居的光谱特征
Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets
论文作者
论文摘要
我们研究了下一个邻居（NNN）跳跃对强相关的掺杂抗铁磁性铜旋转链链的低能集体激发的影响。具体而言，我们使用精确的对角度化和密度矩阵恢复统计组方法来研究单粒子光谱函数，动力学旋转和电荷结构因子以及Cu $ l $ -L-gedge谐振弹性X射线散射（RIXS）强度$ t $ t $ - $ t $ - $ t $ t^\ prime-prime j $ - $ j $ $ j $ $ j $ a $ $ t $ t $ t $ t prime t $ t prime t five prime tive。我们发现，随着$ | t^\ prime | $的增加并确定其在动态响应函数中的指纹，我们发现了旋转荷兰分离的崩溃的证据。 nnn跳跃的伴侣伴侣旋子和霍隆激发，导致了旋转 - 波隆的形成，在那里，铁磁自旋极化云使掺杂的载体着装。旋转棕榈龙在动态相关函数中表现为额外的光谱重量，它们同时出现在自旋和电荷敏感的通道中。我们还证明，由于RIX对自旋和电荷自由度的敏感性，RIX可以提供自旋岩石龙的独特视图。
We study the impact of next-nearest-neighbor (nnn) hopping on the low-energy collective excitations of strongly correlated doped antiferromagnetic cuprate spin chains. Specifically, we use exact diagonalization and the density matrix renormalization group method to study the single-particle spectral function, the dynamical spin and charge structure factors, and the Cu $L$-edge resonant inelastic x-ray scattering (RIXS) intensity of the doped $t$-$t^\prime$-$J$ model for a set of $t^\prime$ values. We find evidence for the breakdown of spin-charge separation as $|t^\prime|$ increases and identify its fingerprints in the dynamical response functions. The inclusion of nnn hopping couples the spinon and holon excitations, resulting in the formation of a spin-polaron, where a ferromagnetic spin polarization cloud dresses the doped carrier. The spin-polaron manifests itself as additional spectral weight in the dynamical correlation functions, which appear simultaneously in the spin- and charge-sensitive channels. We also demonstrate that RIXS can provide a unique view of the spin-polaron, due to its sensitivity to both the spin and charge degrees of freedom.
