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Green's function approach to half-filled Kondo lattice—Comparison with Gutzwiller approximation

✍ Scribed by Ryousuke Shiina; Chikara Ishii

Book ID
104634474
Publisher
Springer US
Year
1993
Tongue
English
Weight
392 KB
Volume
91
Category
Article
ISSN
0022-2291

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✦ Synopsis

The ground state energy, quasiparticle excitation spectrum and distribution function are studied in terms of the Schuh equation for the carrier self-energy, derived by decoupling method The results are compared in detail with those obtained in the Gutzwiller approximation. It is shown that these different approximations yield consistent results with each other in ground state energy and quasiparticle energy spectrum.

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