2008/08/31 by K. W. Kim, Genda Gu, G. D. Gu
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Charge (physics) #Condensed matter physics #Excitation #Excited state #Exciton #Magnetic and transport properties of perovskites and related materials #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Singlet state #Spectral line #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.79.085121
published as Phys. Rev. B 79, 085121 (2009) · 4 pages, 4 figures
openalex publication_date 2009/02/24 · arxiv created 2009/02/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigated excitation spectra of the one-dimensional chain compound Sr2CuO3. The small peak at 2.3 eV in the loss function turned out to correspond to the strong charge-transfer transition at 1.8 eV in conductivity. It has the excitonic character expected in one-dimensional extended Hubbard model of the transition from the lower Hubbard band to the Zhang-Rice singlet state. The strongest peak at 2.7 eV in the loss function is attributed to the continuum excitation of the excitonic charge-transfer transition. The spectral weight sum rule is satisfied within these transitions.