Strongly correlated Fermi liquid and the normal state of high T sub c superconductors

Journal Article · Sun Mar 01 00:00:00 EST 1992 · International Journal of Modern Physics B; (United States)

DOI:https://doi.org/10.1142/S0217979292000384· OSTI ID:5223353

Wang, Z ^[1]

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1. Dept. of Physics, Rutgers Univ., Piscataway, NJ (US)

In this paper insights into the strongly correlated Fermi liquid state of the SU(N) infinite-U Hubbard and t-J models are presented in connection to the metallic state of unbroken symmetry of the copper oxide planes. The nature of single particle and collective excitations is analyzed and the Landau Fermi Liquid parameters are derived. The one-particle spectral function in the Hubbard valence band is obtained with both Hubbard and Guntzwiller-like features. A simple interpretation of the large incoherent background is given in terms of a superposition of quasiparticles and a collective mode describing the propagation of a bare hole in a large U system. The spin exchange interactions produce very low lying collective modes describing the propagation of staggered spin chirality which soften at incommensurate wavevectors. The quasiparticles are strongly scattered by the low lying chirality fluctuations resulting in deviations from canonical Fermi liquid behavior at low energy scales. Of the same origin, the quasiparticle self energy is found to be strongly {kappa}-dependent. It leads to corrections to the dispersion and enhancement of the quasiparticle lifetime in the hole-like region of the interacting Fermi surface. The combined effects are sufficient to produce a sign change in the Hall coefficient evaluated for parameters relevant to the copper oxide planes. The authors show that these models also exhibit a zero temperature fluctuation driven transition from Fermi liquid to non Fermi liquid phase without the onset of magnetic ordering below a critical doping {delta}{sub c} = 1/4N, whereby providing a microscopic mechanism for the destruction of the Fermi liquid coherence by strong longitudinal gauge fluctuations which represent the effects of the infinite-U constraint.

• OSTI ID: 5223353
• Journal Information: International Journal of Modern Physics B; (United States), Vol. 6:5; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FERMI GAS
HAMILTONIANS
HIGH-TC SUPERCONDUCTORS
ELECTRIC CONDUCTIVITY
COLLECTIVE EXCITATIONS
CORRELATION FUNCTIONS
CUPRATES
EXCHANGE INTERACTIONS
FLUCTUATIONS
HOLES
MAGNETIC PROPERTIES
QUASI PARTICLES
SPECTRAL FUNCTIONS
SU GROUPS
SYMMETRY BREAKING
TEMPERATURE ZERO K
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
FUNCTIONS
GASES
INTERACTIONS
LIE GROUPS
MATHEMATICAL OPERATORS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
SUPERCONDUCTORS
SYMMETRY GROUPS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
665411* - Basic Superconductivity Studies- (1992-)