Impact of Quenched Oxygen Disorder on Charge Density Wave Order in YBa2Cu3O6+x

被引：45
作者：
Achkar, A. J. [1 ]
Mao, X. [1 ]
McMahon, Christopher [1 ]
Sutarto, R. [2 ]
He, F. [2 ]
Liang, Ruixing [3 ]
Bonn, D. A. [3 ]
Hardy, W. N. [3 ]
Hawthorn, D. G. [1 ]
机构：
[1] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada
[2] Canadian Light Source, Saskatoon, SK S7N 2V3, Canada
[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 10期
基金：
加拿大健康研究院; 加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
SINGLE-CRYSTALS; PHASE-DIAGRAM; STRIPE ORDER; FLUCTUATIONS; PSEUDOGAP;
D O I：
10.1103/PhysRevLett.113.107002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The competition between superconductivity and charge density wave (CDW) order in underdoped cuprates has now been widely reported, but the role of disorder in this competition has yet to be fully resolved. A central question is whether disorder sets the length scale of the CDW order, for instance by pinning charge density fluctuations or disrupting an otherwise long-range order. Using resonant soft x-ray scattering, we investigate the sensitivity of CDW order in YBa2Cu3O6+x (YBCO) to varying levels of oxygen disorder. We find that quench cooling YBCO6.67 (YBCO6.75) crystals to destroy their o-V and o-VIII (o-III) chains decreases the intensity of the CDW superlattice peak by a factor of 1.9 (1.3), but has little effect on the CDW correlation length, incommensurability, and temperature dependence. This reveals that while quenched oxygen disorder influences the CDW order parameter, the spatial extent of the CDW order is insensitive to the level of quenched oxygen disorder and may instead be a consequence of competition with superconductivity.
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页数：5
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