Theory of the leading edge gap in underdoped cuprates
Abstract
We present the theory of the leading edge gap in the normal state of underdoped high-Tc materials. The consideration is based on a magnetic scenario for cuprates. We show that as doping decreases, the increasing interaction with paramagnons gives rise to a near destruction of the Fermi liquid and this in turn yields precursors to d-wave pairing. We argue that the leading edge gap at 30 meV and a broad maximum in the spectral function at 150 meV are byproducts of the same physical phenomenon.
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