Real-space visualization of remnant Mott gap and magnon excitations.
Real-space visualization of remnant Mott gap and magnon excitations.
复制标题
剩余莫特间隙和磁振子激发的真实空间可视化。
DOI：
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发表时间：
2013
影响因子：
8.6
通讯作者：
T. Devereaux
中科院分区：
文献类型：
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作者：
Y. Wang;C. Jia;B. Moritz;T. Devereaux
我们展示了在单带Hubbard模型的Mott相中显示电荷间隙和磁振子激发的真实空间动力学的能力，以及这些激发在空穴或电子掺杂下的残余。在短时间内，即使在远离Mott相和反铁磁相的大掺杂情况下，磁激发和电荷激发的特性也保持不变。掺杂影响了这些激发的真实空间模式和长时间尺度，其明显的载流子不对称性可归因于基本模型中粒子-空穴对称性的破坏。此外，快速振荡的电荷密度波状图案减弱，但作为半填充时仍然存在的亚偏置不稳定性的可见证据，该不稳定性在掺杂后仍然存在。这些结果为分析动量空间不可访问或定义不明确的系统的行为提供了一种方法。
We demonstrate the ability to visualize real-space dynamics of charge gap and magnon excitations in the Mott phase of the single-band Hubbard model and the remnants of these excitations with hole or electron doping. At short times, the character of magnetic and charge excitations is maintained even for large doping away from the Mott and antiferromagnetic phases. Doping influences both the real-space patterns and long timescales of these excitations with a clear carrier asymmetry attributable to particle-hole symmetry breaking in the underlying model. Further, a rapidly oscillating charge-density-wave-like pattern weakens, but persists as a visible demonstration of a subleading instability at half-filling which remains upon doping. The results offer an approach to analyzing the behavior of systems where momentum space is either inaccessible or poorly defined.