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

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

2012-03-08

arxiv.org/abs/1203.1946v1

Physics

Condensed Matter

Superconductivity

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

Scientific paper

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.

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