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Title:
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Non-Fermi liquid states in strongly correlated electron systems |
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Author:
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Smith, John Lleweilun |
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Advisor:
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Si, Qimiao |
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Degree:
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Doctor of Philosophy thesis |
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Abstract:
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In this thesis, we develop a dynamical mean field approach to strongly correlated electron systems. Our approach is based on the standard limit of infinite dimensions but goes beyond that by treating inter-unit-cell interactions on an equal footing with inter-unit-cell ones. We apply this approach to several systems, including the Kondo lattice model and the extended Hubbard model. For the extended Hubbard model, we find that certain non-Fermi liquid states survive in the presence of intra-unit-cell interactions. Our results provide the first step towards establishing the relevance of these states to physical systems in finite dimensions. For the Kondo lattice model, we identify a novel quantum critical point where the local Kondo dynamics is also critical. This novel critical point appears to describe what happens in certain heavy fermion metals close to a magnetic phase transition. |
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Citation:
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Smith, John Lleweilun. "Non-Fermi liquid states in strongly correlated electron systems." Doctoral Thesis, Rice University, ETD http://hdl.handle.net/1911/18024. |
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Citable link to this page:
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http://hdl.handle.net/1911/18024 |
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Date:
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2000 |
