Charge-density wave (CDW) modulations in underdoped high-temperature cuprate superconductors remain a central puzzle in condensed matter physics. However, despite a substantial experimental verification of this ubiquitous phase in a large class of high Tc cuprates, a complete theoretical explanation of this phase is still missing. Here, we build upon our recent proposal that the CDW in underdoped cuprates (Y- and Bi- based compounds) emerges from a unique cooperation of the B1g bond-buckling phonon with strong electronic correlations. We assume a static mean-field lattice distortion with B1g symmetry, regardless of its origin, with a commensurate wave vector q∗=(2π/3,0)/(0,2π/3). We show that such a phonon-induced CDW (both uni- and bi-axial) reconstructs the Fermi surface, leading to electron and hole pockets, with relevant quantum oscillation frequencies in close consistency with the experiments. Furthermore, a systematic analysis of the symmetry of the intra-unit-cell charge modulations on the copper-oxygen planes is provided. We find that the atomic charge modulation on the CuO2 unit cell is predominantly of s-wave character -- in support of the recent experimental observation.
@article{arxiv.2008.01401,
title = {Intrinsic Hallmarks of Phonon-Induced Charge Order in Cuprates},
author = {S. Banerjee and W. A. Atkinson and A. P. Kampf},
journal= {arXiv preprint arXiv:2008.01401},
year = {2023}
}