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arXiv 0901.2313cond-mat.supr-concond-mat.str-el
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高温超导体中的费米表面重建

Fermi surface reconstruction in high-Tc superconductors

Louis Taillefer

摘要:

最近在欠掺杂的高Tc超导体中观察到的量子振荡,结合它们在低温下的负霍尔系数,揭示了空穴掺杂的铜酸盐的费米表面包括一个小的电子口袋。这强烈表明,大孔费米表面特性的过掺杂制度经历了重建所造成的发病的一些秩序,打破平移对称性。在这里,我们考虑这种顺序是“条纹”顺序的可能性,这是一种在Eu掺杂和Nd掺杂LSCO等材料中观察到的最清楚的电荷/自旋调制形式。在这些材料中,条纹序的出现确实是费米面重构的原因。我们确定的临界掺杂,这种重建发生,并表明,在该掺杂的传输系数的温度依赖性是典型的金属在量子临界点。我们讨论了如何pseudogap相可能是一个波动的条纹有序相的前体。

英文摘要:

The recent observation of quantum oscillations in underdoped high-Tc superconductors, combined with their negative Hall coefficient at low temperature, reveals that the Fermi surface of hole-doped cuprates includes a small electron pocket. This strongly suggests that the large hole Fermi surface characteristic of the overdoped regime undergoes a reconstruction caused by the onset of some order which breaks translational symmetry. Here we consider the possibility that this order is "stripe" order, a form of charge / spin modulation observed most clearly in materials like Eu-doped and Nd-doped LSCO. In these materials, the onset of stripe order is indeed the cause of Fermi-surface reconstruction. We identify the critical doping where this reconstruction occurs and show that the temperature dependence of transport coefficients at that doping is typical of metals at a quantum critical point. We discuss how the pseudogap phase may be a fluctuating precursor of the stripe-ordered phase.

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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