Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films

C. N. Borca, B. Xu, T. Komesu, H. K. Jeong, M. T. Liu, Sy-Hwang Liou, S. Stabler, Y. Idzerda, P. A. Dowben

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Abstract

Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La0.65Pb0.35MnO3 thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

Original languageEnglish (US)
Pages (from-to)722-728
Number of pages7
JournalEurophysics Letters
Volume56
Issue number5
DOIs
StatePublished - Dec 1 2001

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electronic structure
thin films
asymmetry
surface temperature
absorption spectroscopy
photoelectric emission
annealing
x rays
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films. / Borca, C. N.; Xu, B.; Komesu, T.; Jeong, H. K.; Liu, M. T.; Liou, Sy-Hwang; Stabler, S.; Idzerda, Y.; Dowben, P. A.

In: Europhysics Letters, Vol. 56, No. 5, 01.12.2001, p. 722-728.

Research output: Contribution to journalArticle

Borca, CN, Xu, B, Komesu, T, Jeong, HK, Liu, MT, Liou, S-H, Stabler, S, Idzerda, Y & Dowben, PA 2001, 'Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films', Europhysics Letters, vol. 56, no. 5, pp. 722-728. https://doi.org/10.1209/epl/i2001-00580-y
Borca, C. N. ; Xu, B. ; Komesu, T. ; Jeong, H. K. ; Liu, M. T. ; Liou, Sy-Hwang ; Stabler, S. ; Idzerda, Y. ; Dowben, P. A. / Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films. In: Europhysics Letters. 2001 ; Vol. 56, No. 5. pp. 722-728.
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AU - Liu, M. T.

AU - Liou, Sy-Hwang

AU - Stabler, S.

AU - Idzerda, Y.

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