Coherent and incoherent excitations of electron-doped SrTiO3

Yukiaki Ishida, Ritsuko Eguchi, Masaharu Matsunami, Koji Horiba, Munetaka Taguchi, Ashish Chainani, Yasunori Senba, Haruhiko Ohashi, Hiromichi Ohta, Shik Shin

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66 Citations (Scopus)

Abstract

Resonant photoemission at the Ti 2p and O 1s edges on a Nb-doped SrTiO3 thin film revealed that the coherent state (CS) at the Fermi level (EF) had a mainly Ti 3d character whereas the incoherent in-gap state (IGS) positioned ∼1.5eV below EF had a mixed character of Ti 3d and O 2p states. This indicates that the IGS is formed by a spectral-weight transfer from the CS and subsequent spectral-weight redistribution through d-p hybridization. We discuss the evolution of the excitation spectrum with 3d band filling and rationalize the IGS through a mechanism similar to that proposed by Haldane and Anderson.

Original languageEnglish
Article number056401
JournalPhysical Review Letters
Volume100
Issue number5
DOIs
Publication statusPublished - Feb 4 2008
Externally publishedYes

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excitation
electrons
photoelectric emission
thin films

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ishida, Y., Eguchi, R., Matsunami, M., Horiba, K., Taguchi, M., Chainani, A., ... Shin, S. (2008). Coherent and incoherent excitations of electron-doped SrTiO3. Physical Review Letters, 100(5), [056401]. https://doi.org/10.1103/PhysRevLett.100.056401

Coherent and incoherent excitations of electron-doped SrTiO3. / Ishida, Yukiaki; Eguchi, Ritsuko; Matsunami, Masaharu; Horiba, Koji; Taguchi, Munetaka; Chainani, Ashish; Senba, Yasunori; Ohashi, Haruhiko; Ohta, Hiromichi; Shin, Shik.

In: Physical Review Letters, Vol. 100, No. 5, 056401, 04.02.2008.

Research output: Contribution to journalArticle

Ishida, Y, Eguchi, R, Matsunami, M, Horiba, K, Taguchi, M, Chainani, A, Senba, Y, Ohashi, H, Ohta, H & Shin, S 2008, 'Coherent and incoherent excitations of electron-doped SrTiO3', Physical Review Letters, vol. 100, no. 5, 056401. https://doi.org/10.1103/PhysRevLett.100.056401
Ishida Y, Eguchi R, Matsunami M, Horiba K, Taguchi M, Chainani A et al. Coherent and incoherent excitations of electron-doped SrTiO3. Physical Review Letters. 2008 Feb 4;100(5). 056401. https://doi.org/10.1103/PhysRevLett.100.056401
Ishida, Yukiaki ; Eguchi, Ritsuko ; Matsunami, Masaharu ; Horiba, Koji ; Taguchi, Munetaka ; Chainani, Ashish ; Senba, Yasunori ; Ohashi, Haruhiko ; Ohta, Hiromichi ; Shin, Shik. / Coherent and incoherent excitations of electron-doped SrTiO3. In: Physical Review Letters. 2008 ; Vol. 100, No. 5.
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AU - Chainani, Ashish

AU - Senba, Yasunori

AU - Ohashi, Haruhiko

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