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arXiv 1310.4472cond-mat.supr-con
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高温超导体中Skyrmion的证据

Evidence for skyrmions in the high-temperature superconductors

Alfredo A. Vargas-Paredes, Marco Cariglia, Mauro M. Doria, Edinardo I. B. Rodrigues, A. R. de C. Romaguera

摘要:

我们声称,最近发现的电荷密度波的共振软X射线散射在层状氧化铜是由相邻的铜$^{3+}$离子之间的距离确定的CuO $_2$层的临界温度的四重对称性。我们发现的证据表明,这tetraxenic对称是一个skyrmionic状态,这是负责一个不寻常的磁秩序和电荷流的层,导致时间反演对称性的赝能隙线以下的破坏。Skyrmions的核心形成局部磁场的口袋,以与单位晶胞的其余部分相反的方向穿透超导层。

英文摘要:

We claim that the charge density wave recently found by resonant soft x-ray scattering in layered copper oxides is the tetragonal symmetry defined by the distance between neighbor Cu$^{3+}$ ions in the CuO$_2$ layer that determines the critical temperature. We find evidence that this tetragonal symmetry is a skyrmionic state, which is responsible for an unusual magnetic order and charge flow in the layers that leads to the breaking of the time reversal symmetry below the pseudogap line. The core of the skyrmions form pockets of local magnetic field piercing the superconducting layers in opposite direction to the rest of the unit cell.

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