自旋极化吸引哈伯德模型中d波自旋密度波相位
d-Wave Spin Density Wave phase in the Attractive Hubbard Model with Spin Polarization
摘要：
研究了有限自旋极化的吸引哈伯德模型中非常规自旋密度波的可能性。我们发现，配对和密度涨落诱导横向d波SDW附近的半填充。这种新的SDW与由反铁磁自旋涨落引起的d波超流性有关，在这个意义上，它们通过Shiba的吸引-排斥变换相互连接。我们的结果预测了真实系统中的d波SDW，例如具有布居不平衡的冷费米原子气体和涉及价跳跃元素的化合物。
英文摘要：
We investigate the possibility of unconventional spin density wave (SDW) in the attractive Hubbard model with finite spin polarization. We show that pairing and density fluctuations induce the transverse d-wave SDW near the half-filling. This novel SDW is related to the d-wave superfluidity induced by antiferromagnetic spin fluctuations, in the sense that they are connected with each other through Shiba's attraction-repulsion transformation. Our results predict the d-wave SDW in real systems, such as cold Fermi atom gases with population imbalance and compounds involving valence skipper elements.
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