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Pis'ma v Zh. Èksper. Teoret. Fiz., 2014, Volume 100, Issue 3, Pages 218–225 (Mi jetpl3800)  

This article is cited in 3 scientific papers (total in 3 papers)

METHODS OF THEORETICAL PHYSICS

On the density of states for the Hubbard model: pseudo-particle Keldysh diagram method – an alternative to DMFT?

P. I. Arseeva, N. S. Maslovab

a P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
b M. V. Lomonosov Moscow State University, Faculty of Physics

Abstract: It is shown how to construct Keldysh diagram technique for pseudo-particle approach to the Hubbard model. We propose self consistent equations for pseudo particle and electron Green functions in Keldysh diagram technique. Nonlocal effects (spatial dispersion) are included in single impurity problem in this method. Thus we can get rid of the artificial central peak (of Kondo type) in the density of states which is inevitable in Dynamical Mean Field Theory (DMFT). The changes in the density of states for 2D Hubbard model due to variation of Coulomb repulsion $U$ and electron concentration are analyzed.

DOI: https://doi.org/10.7868/S0370274X14150119

Full text: PDF file (325 kB)
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English version:
Journal of Experimental and Theoretical Physics Letters, 2014, 100:3, 197–204

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Received: 01.07.2014
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Citation: P. I. Arseev, N. S. Maslova, “On the density of states for the Hubbard model: pseudo-particle Keldysh diagram method – an alternative to DMFT?”, Pis'ma v Zh. Èksper. Teoret. Fiz., 100:3 (2014), 218–225; JETP Letters, 100:3 (2014), 197–204

Citation in format AMSBIB
\Bibitem{ArsMas14}
\by P.~I.~Arseev, N.~S.~Maslova
\paper On the density of states for the Hubbard model:
pseudo-particle Keldysh diagram method -- an alternative to DMFT?
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2014
\vol 100
\issue 3
\pages 218--225
\mathnet{http://mi.mathnet.ru/jetpl3800}
\crossref{https://doi.org/10.7868/S0370274X14150119}
\elib{http://elibrary.ru/item.asp?id=21997952}
\transl
\jour JETP Letters
\yr 2014
\vol 100
\issue 3
\pages 197--204
\crossref{https://doi.org/10.1134/S002136401415003X}
\isi{http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&DestLinkType=FullRecord&DestApp=ALL_WOS&KeyUT=000343708300011}
\elib{http://elibrary.ru/item.asp?id=24027467}
\scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-84920139344}


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    Citing articles on Google Scholar: Russian citations, English citations
    Related articles on Google Scholar: Russian articles, English articles

    This publication is cited in the following articles:
    1. P. I. Arseev, Phys. Usp., 58:12 (2015), 1159–1205  mathnet  crossref  crossref  adsnasa  isi  elib
    2. Sherman A., Phys. Status Solidi B-Basic Solid State Phys., 252:9 (2015), 2006–2012  crossref  adsnasa  isi  elib  scopus
    3. Maslova N.S., Arseyev I P., Mantsevich V.N., Sci Rep, 9 (2019), 3130  crossref  isi  scopus
  •       Pis'ma v Zhurnal ksperimental'noi i Teoreticheskoi Fiziki
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