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arXiv 0801.2722cond-mat.str-el
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高温超导体中RVB空穴条纹的稳定性

Stability of RVB hole stripes in high-temperature superconductors

Manuela Capello, Marcin Raczkowski, Didier Poilblanc

摘要:

最近的STM(扫描隧道显微镜)和霍尔电阻测量表明,低掺杂铜酸盐中的密度波态引起了新的关注,即使在没有反铁磁性的情况下,条纹是否可以稳定在铜酸盐材料的超导相。在这里,我们调查这个问题,使用最先进的量子蒙特卡罗计算的$t-J$模型。特别是,我们考虑的稳定性的单向孔域在调制超导背景下,考虑到四方晶格畸变,次近邻跳跃和长程库仑排斥的影响。

英文摘要:

Indications of density-wave states in underdoped cuprates, coming from recent STM (scanning tunneling microscopy) and Hall-resistance measurements, have raised new concerns whether stripes could be stabilized in the superconducting phase of cuprate materials, even in the absence of antiferromagnetism. Here, we investigate this issue using state-of-the-art quantum Monte Carlo calculations of a $t-J$ model. In particular we consider the stability of unidirectional hole domains in a modulated superconducting background, by taking into account the effect of tetragonal-lattice distortions, next-nearest neighbor hopping and long-range Coulomb repulsion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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