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Title: Gutzwiller charge phase diagram of cuprates, including electron-phonon coupling effects
Authors: Markiewicz, R.S
Seibold, G
Lorenzana, J
Bansil, A 
Keywords: Charge density
Charge density waves
Degrees of freedom (mechanics)
Electron-phonon interactions
Fermi surface
High temperature superconductors
Phase diagrams
Electron-phonon coupling effects
Electronic correlation
Fermi surface nesting
Hole-doped cuprates
Magnetic fluctuation
Ordering phenomena
Issue Date: 2015
Publisher: Institute of Physics Publishing
Citation: Markiewicz, R.S, Seibold, G, Lorenzana, J, Bansil, A (2015). Gutzwiller charge phase diagram of cuprates, including electron-phonon coupling effects. New Journal of Physics 17 : 23074. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Besides significant electronic correlations, high-temperature superconductors also show a strong coupling of electrons to a number of lattice modes. Combined with the experimental detection of electronic inhomogeneities and ordering phenomena in many high-Tc compounds, these features raise the question as to what extent phonons are involved in the associated instabilities. Here we address this problem based on the Hubbard model including a coupling to phonons in order to capture several salient features of the phase diagram of hole-doped cuprates. Charge degrees of freedom, which are suppressed by the large Hubbard U near half-filling, are found to become active at a fairly low doping level. We find that possible charge order is mainly driven by Fermi surface nesting, with competition between a near- order at low doping and antinodal nesting at higher doping, very similar to the momentum structure of magnetic fluctuations. The resulting nesting vectors are generally consistent with photoemission and tunneling observations, evidence for charge density wave order in YBa2Cu3O including Kohn anomalies, and suggestions of competition between one- and two-q-vector nesting. © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
ISSN: 1367-2630
DOI: 10.1088/1367-2630/17/2/023074
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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