Correlation Effects in One-Dimensional Quasiperiodic Anderson-Lattice Model

• 松田, 冬樹

• 手塚, 真樹

• 川上, 則雄

抄録

We consider the one-dimensional (1D) quasiperiodic Anderson-lattice model, which has quasiperiodically ordered impurities. The sites with an f-orbital are ordered as a "Fibonacci word", one way to form 1D quasiperiodic orderings. To treat the correlation effect precisely, we use the density matrix renormalization group (DMRG) method. We show that the spin correlation function in the quasiperiodic system gives a characteristic pattern. Also, by analyzing the f-electron number and its fluctuation, we find that a valence transition, which usually occurs in the periodic Anderson model when the on-site interorbital interaction is large, is not sharp in the quasiperiodic system. Finally, we discuss the properties of the quasiperiodic Anderson-lattice model, comparing them against the Anderson-lattice model with randomly located f-orbitals. We find that the quasiperiodic Anderson-lattice model has a similar property to the periodic Anderson model for spin correlation, but also has a similar property to the Anderson-lattice model with randomly located f-orbitals for the valence fluctuation.

20th International Conference on Magnetism, ICM 2015.

収録刊行物

• Physics Procedia

  Physics Procedia 75 245-251, 2015

  Elsevier B.V.

キーワード

• Anderson-lattice model
• DMRG
• Quasiperiodicity

詳細情報

• CRID: 1050564285789129472
• NII論文ID: 120005822747
• ISSN: 18753892
• DOI: 10.1016/j.phpro.2015.12.030
• HANDLE: 2433/216132
• Web Site: https://api.elsevier.com/content/article/PII:S1875389215016697?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S1875389215016697?httpAccept=text/plain
• 本文言語コード: en
• 資料種別: journal article
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