Spin-charge separation in single-chain compound Sr2CuO3 studied by angle-resolved photoemission

H. Fujisawa, Takayoshi Yokoya, T. Takahashi, S. Miyasaka, M. Kibune, H. Takagi

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Abstract

Angle-resolved photoemission measurements were performed for one-dimensional Sr2CuO3 which consists of single Cu-O chains. Two dispersive bands were observed near EF in the first half of the Brillouin zone (k = 0 to π/2) of the chain-direction. Both bands have a common maximum point closest to EF at k = π/2 while they show different dispersions of about 0.25 and 1 eV, respectively, with a continuous intensity distribution in between. The less dispersive band is almost diminished in another half of the Brillouin zone (k = π/2 to π). These results are consistent with the solution of the one-dimensional Hubbard model as well as the t-J model calculation, suggesting the spin-charge separation in the one-dimensional Cu-O chain. The experimental results are compared with those of the double-chain compound SrCuO2.

Original languageEnglish
Pages (from-to)543-547
Number of pages5
JournalSolid State Communications
Volume106
Issue number8
Publication statusPublished - May 1998
Externally publishedYes

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Keywords

  • A. insulators
  • D. electronic band structure
  • E. photoelectron spectroscopies

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Fujisawa, H., Yokoya, T., Takahashi, T., Miyasaka, S., Kibune, M., & Takagi, H. (1998). Spin-charge separation in single-chain compound Sr2CuO3 studied by angle-resolved photoemission. Solid State Communications, 106(8), 543-547.