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Electronic polymers and soft-matter-like broken symmetries in underdoped cuprates

机译:掺杂不足的铜酸盐中的电子聚合物和类似软物质的破碎对称性

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摘要

Empirical evidence in heavy fermion, pnictide and other systems suggests that unconventional superconductivity appears associated to some form of real-space electronic order. For the cuprates, despite several proposals, the emergence of order in the phase diagram between the commensurate antiferromagnetic state and the superconducting state is not well understood. Here we show that in this regime doped holes assemble in ‘electronic polymers'. Within a Monte Carlo study, we find that in clean systems by lowering the temperature the polymer melt condenses first in a smectic state and then in a Wigner crystal both with the addition of inversion symmetry breaking. Disorder blurs the positional order leaving a robust inversion symmetry breaking and a nematic order, accompanied by vector chiral spin order and with the persistence of a thermodynamic transition. Such electronic phases, whose properties are reminiscent of soft-matter physics, produce charge and spin responses in good accord with experiments.
机译:重费米子,磷化物和其他系统的经验证据表明,非常规的超导性似乎与某种形式的真实空间电子秩序有关。对于铜酸盐,尽管提出了一些建议,但对于相称的反铁磁态和超导态之间的相序出现还是不太了解。在这里,我们表明,在这种状态下,掺杂空穴聚集在“电子聚合物”中。在蒙特卡洛研究中,我们发现在干净的系统中,通过降低温度,聚合物熔体首先以近晶状态冷凝,然后在维格纳晶体中冷凝,同时增加了反转对称性破坏。无序模糊了位置顺序,留下了强大的反演对称性破坏和向列顺序,伴随着矢量手性自旋顺序以及热力学跃迁的持续存在。这种电子相的性质让人联想到软物质物理学,它们产生的电荷和自旋响应与实验非常吻合。

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