A picture of pseudogap phase related to charge fluxes

TL;DR

This paper introduces the concept of charge pseudoplane in cuprates, linking charge flux confinement to pseudogap and superconducting phases, supported by DFT simulations and experimental data, offering new insights into high-temperature superconductivity.

Contribution

It identifies a new charge pseudoplane configuration in cuprates that explains the pseudogap and superconducting phases through charge flux confinement, advancing understanding of high-temperature superconductivity.

Findings

Charge pseudoplane confines dynamic charge fluxes.

Pseudogap and superconducting phases are intertwined via charge flux confinement.

Simulation results agree with ARPES and STM experiments.

Abstract

Recently, charge density fluctuations or charge fluxes attract strong interests in understanding the unconventional superconductivity. In this paper, a new emergent configuration in cuprates is identified by density functional theory simulations, called the charge pseudoplane, which exhibits the property of confining the dynamic charge fluxes for higher superconducting transition temperatures. It further redefines the fundamental collective excitation in cuprates as pQon with the momentum-dependent and ultrafast localization-delocalization duality. It is shown that both pseudogap and superconducting phases can be born from and intertwined through the charge flux confinement property of the charge pseudoplane region. Our experimental simulations based on the new picture provide good agreements with previous angle resolved photoemission spectroscopy and scanning tunneling microscopy results. Our work thus opens a new perspective on the origin of pseudogap phase and other related phases in cuprates, and further provides a critical descriptor to search and design higher temperature superconductors.