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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –
Valence Fluctuations in an Extended Periodic Anderson Model
Takashi Sugibayashi and
Dai S. Hirashima
Department of Physics, Nagoya University, Nagoya 464-8602
The electronic state in an extended periodic Anderson model is studied with the dynamical mean field theory. It is found that the valence fluctuations are enhanced by the repulsive interaction between an f-electron and a conduction electron in agreement with previous studies. However, the spin fluctuations are still more enhanced than the charge fluctuations.
URL:
http://jpsj.ipap.jp/link?JPSJS/75S/244/
DOI: 10.1143/JPSJS.75S.244
KEYWORDS:valence fluctuations, valence instability, extended periodic Anderson model
References
- K. Miyake, S. Schmitt-Rink and C. M. Varma:
Phys. Rev. B 34 (1986) 6554[APS].
- N. D. Mathur, F. M. Grosche, S. R. Julian, I. R. Walker, D. M. Freye, R. K. W. Haselwimmer and G. G. Lonzarich:
Nature 394 (1998) 39[CrossRef].
- A. T. Holmes, D. Jaccard and K. Miyake:
Phys. Rev. B 69 (2004) 024508, [APS]and references therein.
- H. Q. Yuan, F. M. Grosche, M. Deppe, C. Geibel, G. Sparn and F. Steglich:
Science 302 (2003) 2104[CrossRef]
- G-q. Zheng, N. Yamaguchi, H. Kan, Y. Kitaoka, J. L. Sarrao, P. G. Pagliuso, N. O. Moreno and J. D. Thompson:
Phys. Rev. B 70 (2004) 014511[APS].
- S. Kawasaki, G-q. Zheng, H. Kan, Y. Kitaoka, H. Shishido and Y. Ōnuki:
Phys. Rev. Lett. 94 (2005) 037007[APS].
- Y. Onishi and K. Miyake:
Physica B 281–282 (2000) 191[CrossRef].
- Y. Onishi and K. Miyake:
J. Phys. Soc. Jpn. 69 (2000) 3955[JPSJ].
- W. Metzner and D. Vollhardt:
Phys. Rev. Lett. 62 (1989) 324[APS].
- A. Georges, G. Kotliar, W. Krauth and M. J. Rozenberg:
Rev. Mod. Phys. 68 (1996) 13[APS].
- This applies to the present model only when k-dependence of vk is neglected.
- J. E. Hirsch and R. M. Fye:
Phys. Rev. Lett. 56 (1986) 2521[APS].
- M. Jarrell:
Phys. Rev. Lett. 69 (1992) 168[APS].
- S. Watanabe, M. Imada and K. Miyake:
J. Phys. Soc. Jpn. 75 (2006) 043710[JPSJ].