Spectral densities of the symmetric Anderson model

Journal Article · Mon Jul 23 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.496· OSTI ID:6602449

Silver, R N; Gubernatis, J E; Sivia, D S ^[1]; Jarrell, M ^[2]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM (USA) Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
2. Department of Physics, Ohio State University, Columbus, OH (USA)

The spectral density of the single-impurity Anderson model is calculated by a combination of quantum Monte Carlo method to provide data on the Matsubara Green's function, the maximum-entropy method of image reconstruction to invert numerically the spectral representation, and perturbation theory to provide informative default models. The Kondo central peak of the spectral density is shown to be a universal function of {omega}/{ital T}{sub {ital K}} and {ital T}/{ital T}{sub {ital K}} at low frequencies, where {ital T}{sub {ital K}} is the Kondo temperature. The higher-frequency side peaks are nonuniversal. With decreasing {ital T}/{ital T}{sub {ital K}} the Kondo peak grows as the screened local moment disappears.

• OSTI ID: 6602449
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:4; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FUNCTIONS
GREEN FUNCTION
INTEGRAL TRANSFORMATIONS
KONDO EFFECT
LAPLACE TRANSFORMATION
MAGNETIC MOMENTS
MONTE CARLO METHOD
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SCALING LAWS
SOLIDS
TRANSFORMATIONS