A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
What Underlies the Anderson Hamiltonian?
Abstract The Anderson Hamiltonian characterizes a model in which local orbitals interact with each other through Coulomb interactions and with a bath of itinerant states through hybridization. It has been utilized with considerable success to discuss phenomena ranging from the Kondo problem to the occurrence of two peaks in the photoetnission spectra of Ce compounds. Normally, it is studied by examining the content of its solutions. Of comparable significance, however, is the determination of the various parameters entering the model. In trying to find a prescription for the parameters of the model, one simultaneously develops some understanding of the states involved and studies whether the model incorporates enough of the essential physics. One useful tactic is to compare this model with other models and ask how different effects are accommodated. Here, I will compare results from the model with atomic, band, and modified band calculations for f-electron materials. In light of the complexity of the problems posed, it should be appreciated that I will concentrate more on posing questions than on providing answers.
What Underlies the Anderson Hamiltonian?
Abstract The Anderson Hamiltonian characterizes a model in which local orbitals interact with each other through Coulomb interactions and with a bath of itinerant states through hybridization. It has been utilized with considerable success to discuss phenomena ranging from the Kondo problem to the occurrence of two peaks in the photoetnission spectra of Ce compounds. Normally, it is studied by examining the content of its solutions. Of comparable significance, however, is the determination of the various parameters entering the model. In trying to find a prescription for the parameters of the model, one simultaneously develops some understanding of the states involved and studies whether the model incorporates enough of the essential physics. One useful tactic is to compare this model with other models and ask how different effects are accommodated. Here, I will compare results from the model with atomic, band, and modified band calculations for f-electron materials. In light of the complexity of the problems posed, it should be appreciated that I will concentrate more on posing questions than on providing answers.
What Underlies the Anderson Hamiltonian?
Koelling, D. D. (author)
Condensed Matter Theories ; 335-343
1987-01-01
9 pages
Article/Chapter (Book)
Electronic Resource
English
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