Doping Of A One-Dimensional Mott Insulator: Photoemission And Optical Studies Of Sr2 Cu O3+Δ

Authors

T. E. Kidd, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow
T. Valla, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow
P. D. Johnson, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow
K. W. Kim, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow
G. D. Gu, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow
C. C. Homes, Brookhaven National Laboratory Condensed Matter Physics and Materials Science DepartmentFollow

Document Type

Article

Journal/Book/Conference Title

Physical Review B - Condensed Matter and Materials Physics

Volume

77

Issue

5

Abstract

Angle-resolved photoemission and optical spectroscopy are used to probe the electronic structure of the one-dimensional Mott insulator Sr2 Cu O3+δ, both at half-filling and with small concentrations of excess oxygen doping. Spin-charge separation can be seen as evidenced by the existence of spinon and holon branches in the photoemission spectra. Optical studies reveal no significant doping dependence, while photoemission studies show a large energy shift in the spinon and holon states with respect to the main valence band states which remain nearly unaffected. The results suggest the excess dopant carriers are incorporated solely within the one-dimensional Hubbard band which is electronically isolated from the rest of the states in the system. © 2008 The American Physical Society.

Department

Department of Physics

Original Publication Date

2-5-2008

DOI of published version

10.1103/PhysRevB.77.054503

Recommended Citation

Kidd, T. E.; Valla, T.; Johnson, P. D.; Kim, K. W.; Gu, G. D.; and Homes, C. C., "Doping Of A One-Dimensional Mott Insulator: Photoemission And Optical Studies Of Sr2 Cu O3+Δ" (2008). Faculty Publications. 2463.
https://scholarworks.uni.edu/facpub/2463