Superconductivity and intra-unit-cell electronic nematic phase in the three-band model of cuprates

Abstract

The intra-unit-cell nematic phase is studied within the three-band Emery model of the cuprates with the use of the approach based on the diagrammatic expansion of the Gutzwiller wave function (DE-GWF). According to our analysis the spontaneous $C_4$ symmetry breaking of the electronic wave function, leading to the nematic behavior, can appear due to electron correlations induced mainly by the onsite Coulomb repulsion, even in the absence of the corresponding intersite oxygen-oxygen repulsion term. The latter has been considered as the triggering factor of the nematic state formation in a number of previous studies. Also, we show that, at the transition to the nematic phase electron concentration transfer from $d$- to $p$- orbitals takes place, apart from the usually discussed $p_x/p_y$ polarization. The determined stability regime of the nematic phase appears in the doping range similar to that of the paired phase, showing that both phases have a common origin, even though they compete. Also, we show that in a significant doping range a coexistence region of superconductivity and nematicity appears. The results are discussed in the view of the experimental findings considering the relation between nematicity and pseudogap behavior.

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Cited by in corpus (4)

• Superconductivity in high-$T_c$ and related strongly correlated systems from variational perspective: Beyond mean field theory
• Magnetic and charge orders in the ground state of the Emery model -- accurate numerical results
• Superconductivity in the three-band model of cuprates: nodal direction characteristics and influence of intersite interactions
• Cluster dynamical mean field study of intra-unit-cell charge nematicity in hole-doped cuprates