Dynamic Correlations in Doped ID Kondo Insulator--Finite-T DMRG Study

• Shibata Naokazu

  Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305–8573

• Tsunetsugu Hirokazu

  Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305–8573

書誌事項

タイトル別名

• Dynamic Correlations in Doped 1D Kondo Insulator. Finite-T DMRG Study.
• Dynamic Correlations in Doped 1D Kondo Insulator - Finite-<i><i>T</i></i> DMRG Study -

抄録

The finite-T DMRG method is applied to the one-dimensional Kondo lattice model to calculate dynamic correlation functions. Dynamic spin and charge correlations, S_f(ω), S_c(ω), and N_c(ω), and quasiparticle density of states ρ(ω) are calculated in the paramagnetic metallic phase for various temperatures and hole densities. Near half filling, it is shown that a pseudogap grows in these dynamic correlation functions below the crossover temperature characterized by the spin gap at half filling. A sharp peak at ω=0 evolves at low temperatures in S_f(ω) and N_c(ω). This may be evidence of the formation of collective excitations, and this confirms that the metallic phase is a Tomonaga-Luttinger liquid in the low-temperature limit.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 68 (10), 3138-3141, 1999

  一般社団法人 日本物理学会

キーワード

• Kondo lattice
• density of states
• dynamic correlation functions
• density matrix
• renormalization group
• transfer matrix
• Kondo insulator
• Tomonaga-Luttinger liquid
• heavy fermion

詳細情報

• CRID: 1390001204181503744
• NII論文ID: 210000101881
• NII論文ID: 110001955245
• NII論文ID: 130004536857
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.68.3138
• BIBCODE: 1999JPSJ...68.3138S
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 4894885
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4894885
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.68.3138
• 本文言語コード: en
• データソース種別:
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