Theory of Quasiparticles in the Underdoped High- Tc Superconducting State
Xiao-Gang Wen, Patrick A. Lee
DOI 10.1103/PhysRevLett.80.2193 · Physical Review Letters
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Abstract
The microscopic theory of the superconducting state in the SU(2) slave-boson model is developed. We show how the pseudogap and Fermi surface segments in the normal state develop into a d−wave gap in the superconducting state. Even though the superfluid density is of order x (the doping concentration), the physical properties of the low lying quasiparticles are found to resemble those in BCS theory. Thus the microscopic theory lays the foundation for our earlier phenomenological discussion of the unusual superconducting properties in the underdoped cuprates.
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