Tendencies toward nematic order in YBa2Cu3O6+x: Uniform distortion vs. incipient charge stripes

Abstract

Recent neutron scattering and transport data obtained on underdoped YBCO, with strong signatures of rotation symmetry breaking at low temperatures, point toward electron-nematic order in the charge sector. Such order may originate from a uniform distortion with d-wave symmetry or as a precursor of a uni-directional stripe phase. Here, we discuss whether the neutron scattering data can be linked to incipient charge stripes. We employ and extend a phenomenological model for collective spin and charge fluctuations and analyze the resulting spin excitation spectrum under the influence of lattice anisotropies. Our results show that the experimentally observed temperature-dependent magnetic incommensurability is compatible with a scenario of incipient stripes, the temperature dependence being due to the temperature variation of both strength and correlation length of the charge stripes. Finally, we propose further experiments to distinguish the possible theoretical scenarios.

arXiv comment11 pages, 4 figs, submitted to EPJ ST

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• Magnetic-field-induced charge-stripe order in the high temperature superconductor YBa2Cu3Oy
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• Stripes and electronic quasiparticles in the pseudogap state of cuprate superconductors
• Quantitative comparison of single- and two-particle properties in the cuprates
• Disorder Induced Stripes in d-Wave Superconductors