Theoretical investigation of the four-layered self-doped high-T${}_c$ superconductors: evidence of pair tunneling effect

Abstract

Based on a four-layered self-doped $t-J$ type model and the slave-boson mean-field approach, we study theoretically the superconductivity in the electron-doped and hole-doped layers. The neighbor layers are coupled through both the single electron interlayer hopping and pair tunneling effect. The superconducting gap magnitude for the electron-doped band is nearly twice of that of the hole-doped one, which contrasts to our previous understanding of the electron-hole asymmetry in high-T${}_c$ superconductors but consistent with recent angle-resolved-photoemission-spectroscopy experiments in four-layered materials Ba${}_2$Ca${}_3$Cu${}_4$O${}_8$F${}_2$. Our results propose that the pair tunneling effect is important to examine the multi-layered superconducting materials.

arXiv commentMinor Revisions made, accepted for publication in PRL

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Cited by in corpus (3)

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• Superconductivity-driven magnetization modulation in YBa2Cu3O7-δ /SrTiO3/La0.67Sr0.33MnO3 heterostructures
• Detecting competing orders through the edge states in the heterostructures with high-Tc superconductors