Unusual behavior of cuprates explained by heterogeneous charge localization

Abstract

The cuprate high-temperature superconductors are among the most intensively studied materials, yet essential questions regarding their principal phases and the transitions between them remain unanswered. Generally thought of as doped charge-transfer insulators, these complex lamellar oxides exhibit pseudogap, strange-metal, superconducting and Fermi-liquid behaviour with increasing hole-dopant concentration. Here we propose a simple inhomogeneous Mott-like (de)localization model wherein exactly one hole per copper-oxygen unit is gradually delocalized with increasing doping and temperature. The model is percolative in nature, with parameters that are experimentally constrained. It comprehensively captures pivotal unconventional experimental results, including the temperature and doping dependence of the pseudogap phenomenon, the strange-metal linear temperature dependence of the planar resistivity, and the doping dependence of the superfluid density. The success and simplicity of our model greatly demystify the cuprate phase diagram and point to a local superconducting pairing mechanism involving the (de)localized hole.

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• Commensurate antiferromagnetic excitations as a signature of the pseudogap in the tetragonal high-Tc cuprate HgBa${}_2$CuO${}_{4+\delta }$
• Phase Diagram of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Revisited
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• Quasi-static magnetoelectric quadrupoles as the order parameter for the pseudo-gap phase in cuprate superconductors
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Cited by in corpus (40)

• Cuprate superconductors as viewed through a striped lens
• Phase Diagram of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Revisited
• Diagonal Nematicity in the Pseudogap Phase of HgBa${}_2$CuO${}_{4+\delta }$
• Crossover of Charge Fluctuations across the Strange Metal Phase Diagram
• Resistivity phase diagram of cuprates revisited
• High-T${}_c$ cuprates: a story of two electron subsystems
• Strongly-overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Evidence for Josephson-coupled grains of strongly-correlated superconductor
• Unusual dynamic charge-density-wave correlations in HgBa${}_2$CuO${}_{4+\delta }$
• Universal superconducting precursor in the cuprates
• Signatures of enhanced superconducting phase coherence through MID-IR excitation in optimally doped Y-Bi2212
• Unconventional short-range structural fluctuations in cuprate high-$T_c$ superconductors
• Topological-defect-induced surface charge heterogeneities in nematic electrolytes
• Effective-field theory for high-$T_c$ cuprates
• Protected superconductivity at the boundaries of charge-density-wave domains
• Scanning SQUID characterization of extremely overdoped $L{a}_{2-x}S{r}_{x}Cu{O}_4$
• Superfluid density and two-component conductivity in hole-doped cuprates
• Model of charge triplets for high-T${}_c$ cuprates
• Three interaction energy scales in single-layer high-T${}_C$ cuprate HgBa${}_2$CuO${}_{4+\delta }$
• High-temperature superconductors as ionic metals
• Cuprate Twistronics for Quantum Hardware
• A picture of pseudogap phase related to charge fluxes
• Characterization of two electronic subsystems in cuprates through optical conductivity
• Two-component electronic phase separation in the doped Mott insulator Y${}_{1-x}$Ca${}_x$TiO${}_3$
• Percolative Superconductivity in Electron-Doped Sr${}_{1-x}$Eu${}_x$CuO${}_{2+y}$ Films
• Effect of radiation-induced defects on the superfluid density and optical conductivity of overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Transport properties and doping evolution of the Fermi surface in cuprates
• Carrier density crossover and quasiparticle mass enhancement in a doped 5$d$ Mott insulator
• Anisotropic Time-Domain Electronic Response in Cuprates
• Hole-Like Fermi Surface in the Overdoped Non-Superconducting Bi${}_{1.8}$Pb${}_{0.4}$Sr${}_2$CuO${}_{6+\delta }$
• Doping-dependent phonon anomaly and charge-order phenomena in the HgBa${}_2$CuO${}_{4+\delta }$ and HgBa${}_2$CaCu${}_2$O${}_{6+\delta }$
• Nanoscale structural correlations in a model cuprate superconductor
• Dynamics of non-thermal states in optimally-doped $B{i}_{2}S{r}_{2}C{a}_{0.92}{Y}_{0.08}C{u}_2{O}_{8+\delta }$ revealed by mid-infrared three-pulse spectroscopy
• High-entropy magnetism of murunskite
• Two-Dimensional Charge Localization at the Perovskite Oxide Interface
• Meissner effect in non-Hermitian superconductors
• Hall Effect in Doped Mott-Hubbard Insulator
• Unified model of the Hall effect from insulator to overdoped compounds in cuprate superconductors
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• The role of the pseudogap in cuprate superconductors revealed by the Hall effect
• Synthesis of Murunskite Single Crystals: A Bridge Between Cuprates and Pnictides