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Title: SO(6)-generalized pseudogap model of the cuprates

Abstract

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.

Authors:
 [1];  [2];  [1];  [2];  [1]
  1. Physics Department, Northeastern U., Boston, Masschusetts 02115 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20216658
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 483; Journal Issue: 1; Other Information: PBD: 1 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; BISMUTH OXIDES; STRONTIUM OXIDES; CALCIUM OXIDES; COPPER COMPOUNDS; PHASE DIAGRAMS; PHOTOEMISSION; CHARGE DENSITY; ENERGY GAP; THEORETICAL DATA

Citation Formats

Markiewicz, R. S., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, Kusko, C., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, and Vaughn, M. T. SO(6)-generalized pseudogap model of the cuprates. United States: N. p., 1999. Web. doi:10.1063/1.59583.
Markiewicz, R. S., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, Kusko, C., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, & Vaughn, M. T. SO(6)-generalized pseudogap model of the cuprates. United States. doi:10.1063/1.59583.
Markiewicz, R. S., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, Kusko, C., Barnett Institute, Northeastern U., Boston, Masschusetts 02115, and Vaughn, M. T. Wed . "SO(6)-generalized pseudogap model of the cuprates". United States. doi:10.1063/1.59583.
@article{osti_20216658,
title = {SO(6)-generalized pseudogap model of the cuprates},
author = {Markiewicz, R. S. and Barnett Institute, Northeastern U., Boston, Masschusetts 02115 and Kusko, C. and Barnett Institute, Northeastern U., Boston, Masschusetts 02115 and Vaughn, M. T.},
abstractNote = {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.},
doi = {10.1063/1.59583},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 483,
place = {United States},
year = {1999},
month = {9}
}