Nodal Quasiparticles versus Phase Fluctuations in High Tc Superconductors: An Intermediate Scenario
Abstract
We explore a BCS Bose Einstein crossover scenario for 0 ≤ T ≤ Tc and its implications for the superfluid density and specific heat. The low lying excitations consist of nodal (fermionic) quasi-particles as well as excited (bosonic) pair states. Semi-quantitative comparison with cuprate data is reasonable, with no compelling indications for Landau parameter effects.
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