| Issue |
Europhys. Lett.
Volume 44, Number 5, December I 1998
|
|
|---|---|---|
| Page(s) | 655 - 660 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00522-9 | |
| Published online | 01 September 2002 | |
Theory of the leading edge gap in underdoped cuprates
Department of Physics, University of Wisconsin - Madison, WI 53706, USA
Received:
20
April
1998
Accepted:
6
October
1998
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 quasiparticle peak near 
and
symmetry related points.
We then solve the d-wave pairing problem
and show that the actual Tc decreases with the strength of the coherent
quasiparticle peak, but the precursors to d-wave state
exist above Tc even for fully incoherent
quasiparticles.
PACS: 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EDP Sciences, 1998
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