SO(6)-generalized pseudogap model of the cuprates

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59583· OSTI ID:20216658

Markiewicz, R S ^[1]; Kusko, C ^[1]; Vaughn, M T ^[1]

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1. Physics Department, Northeastern U., Boston, Masschusetts 02115 (United States)

The smooth evolution of the tunneling gap of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} with doping from a pseudogap state in the underdoped cuprates to a superconducting state at optimal and overdoping reflects an underlying SO(6) instability structure of the ({pi}, 0) saddle points. The pseudogap is probably not associated with superconductivity, but is related to competing nesting instabilities, which are responsible for the stripe phases. We earlier introduced a simple Ansatz of this competition in terms of a pinned Balseiro-Falicov (pBF) model of competing charge density wave and (s-wave) superconductivity. This model gives a good description of the phase diagram and the tunneling and photoemission spectra. Here, we briefly review these results, and discuss some recent developments: experimental evidence for a non-superconducting component to the pseudogap; and SO(6) generalizations of the pBF model, including flux phase and d-wave superconductivity. (c) 1999 American Institute of Physics.

• OSTI ID: 20216658
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 483; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
CHARGE DENSITY
COPPER COMPOUNDS
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
PHASE DIAGRAMS
PHOTOEMISSION
STRONTIUM OXIDES
THEORETICAL DATA