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  Magnetic moment screening in the correlated Kondo lattice model

Thalmeier, P., Siahatgar, M., Schmidt, B., & Zwicknagl, G. (2013). Magnetic moment screening in the correlated Kondo lattice model. Journal of the Korean Physical Society, 62(10), 1388-1392. doi:10.3938/jkps.62.1388.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1ED6-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1ED7-D
Genre: Journal Article

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 Creators:
Thalmeier, P.1, Author              
Siahatgar, M.2, Author              
Schmidt, B.3, Author              
Zwicknagl, G., Author
Affiliations:
1Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3Burkhard Schmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863464              

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 Abstract: The local moments, magnetic correlations and susceptibility in the 2D half-filled correlated Kondo lattice model are studied. We calculate their dependence on the control parameters given by local exchange coupling J (K) and Coulomb repulsion U. Exact diagonalization (ED) approach for ground state properties as well as finite temperature Lanczos method (FTLM) for the uniform susceptibility are employed for small tiles on the square lattice. The competition of on-site screening and induced inter-site correlations leads to non-monotonic local moment dependence on U for weak Kondo coupling J (K) . In the large U limit the numerical results are compared to those of the analytical bond operator method in mean field treatment. The variation of the Kondo temperature scale with U is obtained from the temperature dependence of the susceptibility. A monotonic increase with U is found.

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Language(s): eng - English
 Dates: 2013-05
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 668954
ISI: 000320122700006
DOI: 10.3938/jkps.62.1388
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Title: Journal of the Korean Physical Society
Source Genre: Journal
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Pages: - Volume / Issue: 62 (10) Sequence Number: - Start / End Page: 1388 - 1392 Identifier: ISSN: 0374-4884