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  Many-body coherent potential approximation, dynamical coherent potential approximation, and dynamical mean-field theory

Kakehashi, Y. (2002). Many-body coherent potential approximation, dynamical coherent potential approximation, and dynamical mean-field theory. Physical Review B, 66(10): 104428. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000066000010104428000001&idtype=cvips&gifs=yes.

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 Creators:
Kakehashi, Y.1, Author           
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Strongly correlated electrons
 Abstract: The coherent potential approximation (CPA) is a useful tool to describe the electron correlations as well as the effects of disorder on electrons. Among various theories of correlated electron systems, the many-body CPA, the dynamical CPA, and the dynamical mean-field theory have been investigated in great detail from the viewpoint of the CPA. It is demonstrated that these three theories are equivalent to each other, so that the theories of itinerant magnetism and those of the strongly correlated electron systems are unified within the single-site approximation. This explains why the Neel temperatures calculated by the dynamical mean-field theory agree well with the ones calculated by the classical and adiabatic versions of the dynamical CPA, the single-site spin-fluctuation theory, and the variational approach.

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Language(s): eng - English
 Dates: 2002-09-01
 Publication Status: Issued
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 Rev. Type: Peer
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Title: Physical Review B
  Alternative Title : Phys. Rev. B
Source Genre: Journal
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Pages: - Volume / Issue: 66 (10) Sequence Number: 104428 Start / End Page: - Identifier: ISSN: 0163-1829