Two-component electron fluid in underdoped high-$T_c$ cuprate superconductors

Abstract

Evidence from NMR of a two-component spin system in cuprate high-$T_c$ superconductors is shown to be paralleled by similar evidence from the electronic entropy so that a two-component quasiparticle fluid is implicated. We propose that this two-component scenario is restricted to the optimal and underdoped regimes and arises from the upper and lower branches of the reconstructed energy-momentum dispersion proposed by Yang, Rice and Zhang (YRZ) to describe the pseudogap. We calculate the spin susceptibility within the YRZ formalism and show that the doping and temperature dependence reproduces the experimental data for the cuprates.

5 pages, 2 figures, accepted for publication in European Physics Letters

References in corpus (6)

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• Intermediate Coupling Model of the Cuprates
• Hall effect and Fermi surface reconstruction via electron pockets in the high-$T_c$ cuprates
• Resistivity phase diagram of cuprates revisited
• Electron pockets and pseudogap asymmetry observed in the thermopower of underdoped cuprates
• Electronic spin susceptibilities and superconductivity in HgBa${}_2$CuO${}_{4+\delta }$ from nuclear magnetic resonance
• Two-component electronic phase separation in the doped Mott insulator Y${}_{1-x}$Ca${}_x$TiO${}_3$
• Nanoscale structural correlations in a model cuprate superconductor