The observation of a surface resonance state in the valence-band structure of the perovskite La0.65Ba0.35MnO3

Carlo Waldfried, D. N. McIlroy, Sy-Hwang Liou, Renat F Sabirianov, S. S. Jaswal, P. A. Dowben

Research output: Contribution to journalArticle

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Abstract

The valence-band electronic structure of a crystalline thin film of La0.65Ba0.35MnO3 has been investigated using angle-resolved photoemission. The observed valence-band structure has a substantial surface contribution and is strongly influenced by the surface conditions. Surface contamination and disorder attenuate the emission from a Mn-3d-derived state at a binding energy of 3.3 eV. This state was found to be localized at the surface with dispersion only in the plane of the surface and exhibited a strong intensity dependence on emission angle. On the basis of a simple LMTO-ASA bulk band calculation, it is clear that this state does not fall within a bulk band gap. We have therefore identified this Mn-3d-derived state at 3.3 eV below EF as a surface resonance.

Original languageEnglish (US)
Pages (from-to)1031-1038
Number of pages8
JournalJournal of Physics Condensed Matter
Volume9
Issue number5
DOIs
StatePublished - Feb 3 1997

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Valence bands
Band structure
Perovskite
valence
acetylsalicylic acid
Photoemission
Binding energy
Electronic structure
perovskite
contamination
Energy gap
Contamination
photoelectric emission
binding energy
disorders
electronic structure
Crystalline materials
Thin films
thin films

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

The observation of a surface resonance state in the valence-band structure of the perovskite La0.65Ba0.35MnO3. / Waldfried, Carlo; McIlroy, D. N.; Liou, Sy-Hwang; Sabirianov, Renat F; Jaswal, S. S.; Dowben, P. A.

In: Journal of Physics Condensed Matter, Vol. 9, No. 5, 03.02.1997, p. 1031-1038.

Research output: Contribution to journalArticle

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AU - Liou, Sy-Hwang

AU - Sabirianov, Renat F

AU - Jaswal, S. S.

AU - Dowben, P. A.

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AB - The valence-band electronic structure of a crystalline thin film of La0.65Ba0.35MnO3 has been investigated using angle-resolved photoemission. The observed valence-band structure has a substantial surface contribution and is strongly influenced by the surface conditions. Surface contamination and disorder attenuate the emission from a Mn-3d-derived state at a binding energy of 3.3 eV. This state was found to be localized at the surface with dispersion only in the plane of the surface and exhibited a strong intensity dependence on emission angle. On the basis of a simple LMTO-ASA bulk band calculation, it is clear that this state does not fall within a bulk band gap. We have therefore identified this Mn-3d-derived state at 3.3 eV below EF as a surface resonance.

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