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  Specific features of a magnetic impurity in a correlated electron model with Ising anisotropy

Zvyagin, A. A., & Schlottmann, P. (2002). Specific features of a magnetic impurity in a correlated electron model with Ising anisotropy. Physical Review B, 66(18): 184422, pp. 184422-184422. doi:10.1103/PhysRevB.66.184422.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-30E3-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-23FB-D
Genre: Journal Article

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 Creators:
Zvyagin, A. A.1, Author              
Schlottmann, P., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: We present the Bethe ansatz solution of a magnetic hybridization impurity in a correlated electron host with Ising-like magnetic anisotropy. On the one hand, the strong correlations between host electrons produce a mixed-valence behavior of the localized electrons. On the other hand, the spin-gap of the low-lying unbound electron states caused by the "easy-axis" magnetic anisotropy suppresses the standard Kondo effect. For small enough magnetic fields the magnetic susceptibility of the impurity is zero. The usual Kondo logarithms, characteristic of SU(2)-symmetric systems with gapless spin-carrying excitations, are replaced by square root singularities caused by the closing of the spin gap at a critical field. Similar behavior is predicted for the free edges of an open chain, which again is very different from the isotropic situation. Using the low-lying excitations in the conformal regime we calculate asymptotics of correlation functions.

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Language(s): eng - English
 Dates: 2002-11-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 18641
ISI: 000179633100058
DOI: 10.1103/PhysRevB.66.184422
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Title: Physical Review B
  Alternative Title : Phys. Rev. B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 66 (18) Sequence Number: 184422 Start / End Page: 184422 - 184422 Identifier: ISSN: 1098-0121