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  Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multiscale Methods

Antipov, A., Gull, E., & Kirchner, S. (2014). Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multiscale Methods. Physical Review Letters, 112: 226401, pp. 1-5. doi:10.1103/PhysRevLett.112.226401.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-DB2B-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-DB2C-9
Genre: Journal Article

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 Creators:
Antipov, Andrey1, Author              
Gull, Emanuel2, Author
Kirchner, Stefan3, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2external, ou_persistent22              
3Stefan Kirchner, cross-PKS/CPfS theory group, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863475              

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 Abstract: Self-consistent dynamical approximations for strongly correlated fermion systems are particularly successful in capturing the dynamical competition of local correlations. In these, the effect of spatially extended degrees of freedom is usually only taken into account in a mean field fashion or as a secondary effect. As a result, critical exponents associated with phase transitions have a mean field character. Here we demonstrate that diagrammatic multiscale methods anchored around local approximations are indeed capable of capturing the non-mean-field nature of the critical point of the lattice model encoded in a nonvanishing anomalous dimension and of correctly describing the transition to mean-field-like behavior as the number of spatial dimensions increases.

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 Dates: 2014-06-04
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevLett.112.226401
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 112 Sequence Number: 226401 Start / End Page: 1 - 5 Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1