1998/06/24 by Tetsuya Mutou, Naokazu Shibata, Kazuo Ueda · 3 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.81.4939
published as Phys.Rev.Lett. 81 (1998) 4939; 82 (1999) 3727 (erratum) · 6 pages, 3 Postscript figures, REVTeX, submitted to Phys. Rev. Lett
arxiv created 1998/06/24 · openalex publication_date 1998/11/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Combination of the finite-temperature density-matrix renormalization group and the maximum entropy presents a new method to calculate dynamic quantities of one-dimensional many-body systems. In the present paper, density of states, local dynamic spin, and charge correlation functions of the one-dimensional Kondo insulator are discussed. Excitation gaps open with decreasing temperature and the gaps take different values depending on channels. The excitation spectra change qualitatively around the characteristic temperature corresponding to the spin gap which is the lowest energy scale of the Kondo insulator.