Hubbard physics in the symmetric half-filled periodic anderson-hubbard model

I. Hagymási, K. Itai, J. Sólyom

Research output: Contribution to journalArticle

Abstract

Two very different methods - exact diagonalization on finite chains and a variational method - are used to study the possibility of a metal-insulator transition in the symmetric half-filled periodic Anderson-Hubbard model. With this aim we calculate the density of doubly occupied d sites (gn d) as a function of various parameters. In the absence of on-site Coulomb interaction (U f) between f electrons, the two methods yield similar results. The double occupancy of d levels remains always finite just as in the one-dimensional Hubbard model. Exact diagonalization on finite chains gives the same result for finite U f, while the Gutzwiller method leads to a Brinkman-Rice transition at a critical value (Udc), which depends on U f and V.

Original languageEnglish
Pages (from-to)1423-1426
Number of pages4
JournalJournal of the Korean Physical Society
Volume62
Issue number10
DOIs
Publication statusPublished - 2013

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physics
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insulators
metals
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Keywords

  • Exact diagonalization
  • Gutzwiller method
  • Periodic Anderson model
  • Strongly correlated system

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Hubbard physics in the symmetric half-filled periodic anderson-hubbard model. / Hagymási, I.; Itai, K.; Sólyom, J.

In: Journal of the Korean Physical Society, Vol. 62, No. 10, 2013, p. 1423-1426.

Research output: Contribution to journalArticle

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