本征高温超导 cuprate 中电荷有序及其与费米液体电荷输运的关系。

Charge order and its connection with Fermi-liquid charge transport in a pristine high-T(c) cuprate.

机构信息

1] School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA [2] AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059 Krakow, Poland.

1] International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.

出版信息

Nat Commun. 2014 Dec 19;5:5875. doi: 10.1038/ncomms6875.

DOI:10.1038/ncomms6875

PMID:25522689

Abstract

Electronic inhomogeneity appears to be an inherent characteristic of the enigmatic cuprate superconductors. Here we report the observation of charge-density-wave correlations in the model cuprate superconductor HgBa2CuO(4+δ) (T(c)=72 K) via bulk Cu L3-edge-resonant X-ray scattering. At the measured hole-doping level, both the short-range charge modulations and Fermi-liquid transport appear below the same temperature of about 200 K. Our result points to a unifying picture in which these two phenomena are preceded at the higher pseudogap temperature by q=0 magnetic order and the build-up of significant dynamic antiferromagnetic correlations. The magnitude of the charge modulation wave vector is consistent with the size of the electron pocket implied by quantum oscillation and Hall effect measurements for HgBa2CuO(4+δ) and with corresponding results for YBa2Cu3O(6+δ), which indicates that charge-density-wave correlations are universally responsible for the low-temperature quantum oscillation phenomenon.

摘要

电子不均匀性似乎是神秘的铜氧化物高温超导体的固有特性。在这里，我们通过体相 Cu L3 边缘共振 X 射线散射报告了在模型铜氧化物高温超导体 HgBa2CuO(4+δ)（T(c)=72 K）中电荷密度波相关的观测结果。在测量的空穴掺杂水平下，短程电荷调制和费米液体输运都出现在大约 200 K 的相同温度以下。我们的结果表明，在更高的赝能隙温度下，这两种现象之前存在 q=0 磁有序和显著的动态反铁磁关联的统一图像。电荷调制波矢的大小与量子振荡和 HgBa2CuO(4+δ)的霍尔效应测量所暗示的电子口袋大小以及 YBa2Cu3O(6+δ)的相应结果一致，这表明电荷密度波相关普遍负责低温量子振荡现象。