Dependence of the photoelectron spectral function on hole doping in Nd1-xSrxTiO3

S. W. Robey; V. E. Henrich; C. Eylem; B. W. Eichhorn

doi:10.1117/12.241782

10 June 1996 Dependence of the photoelectron spectral function on hole doping in Nd1-xSrxTiO3

S. W. Robey, V. E. Henrich, C. Eylem, B. W. Eichhorn

Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241782
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Photoelectron spectroscopy was employed to follow the development of the Ti 3d spectral intensity within approximately 3 eV of the Fermi level (E_F) in Nd_1-xSr_xTiO₃ as a function of x. The total intensity in this region is found to correlate linearly with composition as the nominal Ti valence is varied from plus 3 to plus 4. Changes in the spectral structure in this binding energy region are discussed in terms of the one-electron spectral function. For x less than 0.25, (semiconducting compositions) only incoherent intensity associated with the lower Hubbard band is present. Additional intensity, attributed to a coherent quasiparticle contribution, appears at the composition of the metal-insulator transition, x approximately 0.25. The relative intensities of these two components are determined as a function of x, and connections with theoretical models and experimental results on related systems are discussed.

Citation Download Citation

S. W. Robey, V. E. Henrich, C. Eylem, and B. W. Eichhorn "Dependence of the photoelectron spectral function on hole doping in Nd1-xSrxTiO3", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241782

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