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arXiv · 1808.03618

Doping dependence of d-wave bond-charge excitations in electron-doped cuprates

Hiroyuki Yamase·Matías Bejas·Andrés Greco
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Abstract

Motivated by the recent experiments reporting the doping dependence of the short-range charge order (CO) in electron-doped cuprates, we study the resonant x-ray scattering spectrum from d-wave bond-charge fluctuations obtained in the two-dimensional t-J model. We find that (i) the CO is short-range, (ii) the CO peak is pronounced at low temperature, (iii) the peak intensity increases with decreasing carrier doping $δ$ down to $δ\approx$ 0.10 and is substantially suppressed below $δ\approx$ 0.10 due to strong damping, and (iv) the momentum of the CO decreases monotonically down to $δ\approx$ 0.10 and goes up below $δ\approx$ 0.10. These results reasonably capture the major features of the experimental data, and the observed short-range CO can be consistently explained in terms of bond-charge fluctuations with an internal d-wave symmetry.

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Hiroyuki Yamase, Matías Bejas, Andrés Greco. 2019-01-30. Doping dependence of d-wave bond-charge excitations in electron-doped cuprates. https://doi.org/10.1103/physrevb.99.014513

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