jz100265k_si_001.pdf (519.56 kB)
Universal Properties of Cuprate Superconductors: Tc Phase Diagram, Room-Temperature Thermopower, Neutron Spin Resonance, and STM Incommensurability Explained in Terms of Chiral Plaquette Pairing
journal contribution
posted on 2015-12-16, 16:36 authored by Jamil Tahir-Kheli, William A. GoddardWe report that four properties of cuprates and their evolution with doping are consequences of simply counting four-site plaquettes arising from doping, (1) the universal Tc phase diagram (superconductivity between ∼0.05 and ∼0.27 doping per CuO2 plane and optimal Tc at ∼0.16), (2) the universal doping dependence of the room-temperature thermopower, (3) the superconducting neutron spin resonance peak (the “41 meV peak”), and (4) the dispersionless scanning tunneling conductance incommensurability. Properties (1), (3), and (4) are explained with no adjustable parameters, and (2) is explained with exactly one. The successful quantitative interpretation of four very distinct aspects of cuprate phenomenology by a simple counting rule provides strong evidence for four-site plaquette percolation in these materials. This suggests that inhomogeneity, percolation, and plaquettes play an essential role in cuprates. This geometric analysis may provide a useful guide to search for new compositions and structures with improved superconducting properties.
History
Usage metrics
Categories
Keywords
Tc Phase Diagramsuperconducting neutroncuprate phenomenologyplaquetteNeutron Spin ResonanceCuO 2 planesuperconducting propertiesCuprate Superconductorsdispersionless scanning tunneling conductance incommensurabilityresonance peakUniversal PropertiesChiral Plaquette PairingWe reportdoping dependencepercolationTc phase diagramSTM Incommensurability Explained
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC