Evidence for two electronic components in high-temperature superconductivity from NMR

Abstract

A new analysis of 63Cu and 17O NMR shift data on La1.85Sr0.15CuO4 is reported that supports earlier work arguing for a two-component description of this material, but conflicts with the widely held view that the cuprates are a one-component system. The data are analyzed in terms of two components A and B with susceptibilities Chi(A), Chi(B), and Chi(AB)=Chi(BA) . We find that above Tc, Chi(AB) and Chi(BB) are independent of temperature and obtain for the first time the temperature dependence of all three susceptibilities above Tc as well as the complete temperature dependence of Chi(AA)+Chi(AB) and of Chi(AB)+Chi(BB) below Tc. The form of the results agrees with that recently proposed by Barzykin and Pines.

14 pages, 4 figures

References in corpus (3)

• Scaling in the Emergent Behavior of Heavy Electron Materials
• Planar Cu and O hole densities in high-Tc cuprates determined with NMR
• Universal Behavior and the Two-component Character of Magnetically Underdoped Cuprate Superconductors

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• Toward a New Microscopic Framework for Kondo Lattice Materials
• The Valence Transition Model of Pseudogap, Charge-Order and Superconductivity in Electron- and Hole-Doped Copper Oxides
• NMR Studies of pseudogap and electronic inhomogeneity in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Electronic spin susceptibilities and superconductivity in HgBa${}_2$CuO${}_{4+\delta }$ from nuclear magnetic resonance
• Contrasting Phenomenology of NMR Shifts in Cuprate Superconductors
• Temperature independent cuprate pseudogap from planar oxygen NMR
• Two-component electron fluid in underdoped high-$T_c$ cuprate superconductors
• NMR shift and relaxation and the electronic spin of superconducting cuprates
• A different NMR view of cuprate superconductors
• Unconventional ${}^{17}$O and ${}^{63}$Cu NMR shift components in cuprate superconductors