Interplay between magnetic and superconducting fluctuations in the doped 2d Hubbard model
Interplay between magnetic and superconducting fluctuations in the doped 2d Hubbard model
复制标题
掺杂二维哈伯德模型中磁涨落和超导涨落之间的相互作用
DOI：
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复制
发表时间：
2019
期刊：
影响因子：
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通讯作者：
K. Held
中科院分区：
文献类型：
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作者：
A. Kauch;F. Horbinger;Motoharu Kitatani;Gang Li;K. Held
利用动力学顶点近似和Parquet近似研究了正方形晶格上的Hubbard模型。这些方法使我们能够无偏地描述粒子-空穴通道中的自旋涨落和库珀子通道中的超导涨落的相互干扰。对于小的掺杂，我们发现占主导地位的可伸缩的反铁磁自旋和d波超导波动;对于较大的掺杂不相称的反铁磁自旋波动是伴随着三重态s波超导波动。
We study the Hubbard model on a square lattice, using the dynamical vertex approximation and the parquet approximation. These methods allow us to describe the mutual interference of spin-fluctuations in the particle-hole channel and superconducting fluctuations in the cooperon channel in an unbiased way. For small dopings we find predominant commensurable antiferromagnetic spin- and d-wave superconducting fluctuations; for larger doping incommensurate antiferromagnetic spin fluctuations are concomitant to triplet s-wave superconducting fluctuations.