d-Wave Spin Density Wave phase in the Attractive Hubbard Model with Spin Polarization

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Tamaki, H.
Miyake, K.
Ohashi, Y.
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Abstract
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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.
Keywords
Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
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