Prediction of anomalies in the velocity of sound for the pseudogap of hole-doped cuprates

We predict sound anomalies at the doping 8p where the pseudogap ends in the normal state of hole-doped cuprates. Our prediction is based on the two-dimensional compressible Hubbard model using cluster dynamical mean-field theory. We find sharp anomalies (dips) in the velocity of sound as a function of doping and interaction. These dips are a signature of supercritical phenomena, stemming from an electronic transition without symmetry breaking below the superconducting dome. If experimentally verified, these signatures may help to solve the fundamental question of the nature of the pseudogap, pinpointing its origin as due to Mott physics and resulting short-range correlations.

Automated summary

We predict the presence of sound anomalies in the normal state of hole-doped cuprates at the doping 8p, where the pseudogap ends. These anomalies, characterized by sharp dips in the velocity of sound, are suggestive of supercritical phenomena and provide insights into the nature of the pseudogap.