Fictive Impurity Approach to Dynamical Mean Field Theory
Fictive Impurity Approach to Dynamical Mean Field Theory
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DissertationDate of Exam
07.07.2006Date of Publication
2006Advisor
Monien, HartmutCo-Referee
Millis, Andrew J.Metadata
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Abstract
A new extension of the dynamical mean-field theory was investigated in the regime of large Coulomb repulsion. A number of physical quantities such as single-particle density of states, spin-spin correlation, internal energy and Neel temperature, were computed for a two-dimensional Hubbard model at half-filling. The numerical data were compared to our analytical results as well as to the results computed using the dynamical cluster approximation. In the second part of this work we consider a two-plane Hubbard model. The transport properties of the bilayer were investigated and the phase diagram was obtained.
Subjects
Hubbard Modell, DMFT, Neel Phasenübergang, SCA, Energie, Zustandsdichte, Spin-Spin Korrelation, Phasenübergang, optische Leitfähigkeit, Band Isolator, Mott Isolator, Phasendiagramm
Classification (DDC)
530 PhysikFuhrmann, Andreas: Fictive Impurity Approach to Dynamical Mean Field Theory. - Bonn, 2006. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5N-08208
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5N-08208
@phdthesis{handle:20.500.11811/2646,
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5N-08208,
author = {{Andreas Fuhrmann}},
title = {Fictive Impurity Approach to Dynamical Mean Field Theory},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2006,
note = {A new extension of the dynamical mean-field theory was investigated in the regime of large Coulomb repulsion. A number of physical quantities such as single-particle density of states, spin-spin correlation, internal energy and Neel temperature, were computed for a two-dimensional Hubbard model at half-filling. The numerical data were compared to our analytical results as well as to the results computed using the dynamical cluster approximation. In the second part of this work we consider a two-plane Hubbard model. The transport properties of the bilayer were investigated and the phase diagram was obtained.},
url = {https://hdl.handle.net/20.500.11811/2646}
}
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5N-08208,
author = {{Andreas Fuhrmann}},
title = {Fictive Impurity Approach to Dynamical Mean Field Theory},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2006,
note = {A new extension of the dynamical mean-field theory was investigated in the regime of large Coulomb repulsion. A number of physical quantities such as single-particle density of states, spin-spin correlation, internal energy and Neel temperature, were computed for a two-dimensional Hubbard model at half-filling. The numerical data were compared to our analytical results as well as to the results computed using the dynamical cluster approximation. In the second part of this work we consider a two-plane Hubbard model. The transport properties of the bilayer were investigated and the phase diagram was obtained.},
url = {https://hdl.handle.net/20.500.11811/2646}
}
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