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arXiv · 2301.07637

Stripe Symmetry of Short-range Charge Density Waves in Cuprate Superconductors

Jaewon Choi·Jiemin Li·Abhishek Nag·Jonathan Pelliciari·Hannah Robarts·Charles C. Tam·Andrew Walters·Stefano Agrestini·Mirian García-Fernández·Dongjoon Song·Hiroshi Eisaki·Steven Johnston·Riccardo Comin·Hong Ding·Ke-Jin Zhou
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Abstract

The omnipresence of charge density waves (CDWs) across almost all cuprate families underpins a common organizing principle. However, a longstanding debate of whether its spatial symmetry is stripe or checkerboard remains unresolved. While CDWs in lanthanum- and yttrium-based cuprates possess a stripe symmetry, distinguishing these two scenarios has been challenging for the short-range CDW in bismuth-based cuprates. Here, we employed high-resolution resonant inelastic x-ray scattering to uncover the spatial symmetry of the CDW in Bi$_2$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta}$. Across a wide range of doping and temperature, anisotropic CDW peaks with elliptical shapes were found in reciprocal space. Based on Fourier transform analysis of real-space models, we interpret the results as evidence of unidirectional charge stripes, hosted by mutually 90$^\circ$-rotated anisotropic domains. Our work paves the way for a unified symmetry and microscopic description of CDW order in cuprates.

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Jaewon Choi, Jiemin Li, Abhishek Nag, Jonathan Pelliciari, Hannah Robarts, Charles C. Tam, Andrew Walters, Stefano Agrestini, Mirian García-Fernández, Dongjoon Song, Hiroshi Eisaki, Steven Johnston, Riccardo Comin, Hong Ding, Ke-Jin Zhou. 2023-01-18. Stripe Symmetry of Short-range Charge Density Waves in Cuprate Superconductors. https://doi.org/10.1002/adma.202307515

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