Analysis of surface-bulk screening competition in the electron-doped Nd2-x Cex CuO4 cuprate using x-ray photoemission spectroscopy

G. Panaccione, F. Offi, P. Torelli, G. Vankó, O. Tjernberg, P. Lacovig, A. Guarino, A. Fondacaro, A. Nigro, M. Sacchi, N. B. Brookes, G. Monaco

Research output: Contribution to journalArticle

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Abstract

We report core level and valence band photoemission results obtained for Nd2-x Cex CuO4 (x=0.15) single crystals and films by using both soft and hard x rays, hence, with tunable depth sensitivity. When using hard x rays only, we observe distinct and energy separated structures in the main 2 p5 3 d9 L peak of Cu2 p3/2 and 2 p1/2 core levels, including the well screened features located at the high kinetic energy side, which were recently reported by Taguchi [Phys. Rev. Lett. 95, 177002 (2005)]. By varying the photoelectron takeoff angle, we analyze the difference in the screening properties between surface and bulk, and we demonstrate the depth dependence of the electronic properties by following the evolution of the bulk-related peak. The possible influence of the surface conditions on the Cu2p spectral features is also discussed.

Original languageEnglish
Article number125133
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number12
DOIs
Publication statusPublished - Mar 27 2008

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Core levels
Photoelectron spectroscopy
cuprates
Screening
photoelectric emission
screening
X rays
takeoff
Electrons
Takeoff
Photoemission
Photoelectrons
Valence bands
Kinetic energy
Electronic properties
spectroscopy
Surface properties
photoelectrons
electrons
x rays

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Analysis of surface-bulk screening competition in the electron-doped Nd2-x Cex CuO4 cuprate using x-ray photoemission spectroscopy. / Panaccione, G.; Offi, F.; Torelli, P.; Vankó, G.; Tjernberg, O.; Lacovig, P.; Guarino, A.; Fondacaro, A.; Nigro, A.; Sacchi, M.; Brookes, N. B.; Monaco, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 12, 125133, 27.03.2008.

Research output: Contribution to journalArticle

Panaccione, G, Offi, F, Torelli, P, Vankó, G, Tjernberg, O, Lacovig, P, Guarino, A, Fondacaro, A, Nigro, A, Sacchi, M, Brookes, NB & Monaco, G 2008, 'Analysis of surface-bulk screening competition in the electron-doped Nd2-x Cex CuO4 cuprate using x-ray photoemission spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 77, no. 12, 125133. https://doi.org/10.1103/PhysRevB.77.125133
Panaccione, G. ; Offi, F. ; Torelli, P. ; Vankó, G. ; Tjernberg, O. ; Lacovig, P. ; Guarino, A. ; Fondacaro, A. ; Nigro, A. ; Sacchi, M. ; Brookes, N. B. ; Monaco, G. / Analysis of surface-bulk screening competition in the electron-doped Nd2-x Cex CuO4 cuprate using x-ray photoemission spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 77, No. 12.
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