2023/10/15 by Singh, Dheeraj Kumar, Bang, Yunkyu
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · doi:10.48550/arxiv.2310.09816
We examine charge correlations and instabilities in the pseudogap phase of high-Tc cuprates modeled by d-density wave ordering. The latter has a gap symmetry similar to the one observed in the d-wave superconductor. We use t-J model to describe the charge correlations in the presence of electron-phonon interaction. Our finding suggest that the charge instability in the normal state is dominating at an incommensurate wavevector along (1, 1) instead of (1, 0) for a realistic interaction parameter. The dominance at the diagonal wavevector is further enhanced if the coupling between electron and bond-buckling B1g phonon is incorporated. On the other hand, a dominating charge-density correlation develops along (1, 0) at an incommensurate wavevector in the d-density wave ordered state, which shows a qualitative agreement with the experiments. The correlation becomes robust only in the presence of B1g phonon.