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Phys. Rev. B 60, 13257–13260 (1999)

Temperature-dependent resonant photoemission study of the metallic and charge-ordered phases of Pr1-xSrxMnO3

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J.-S. Kang
Department of Physics, The Catholic University of Korea, Puchon 422-743, Korea

C. G. Olson
Ames Laboratory, Iowa State University, Ames, Iowa 50011

J. H. Jung, S. T. Lee, and T. W. Noh
Department of Physics and Center for Strongly Correlated Materials Research, Seoul National University, Seoul 151-742, Korea

B. I. Min
Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea

Received 12 April 1999; published in the issue dated 15 November 1999

A resonant photoemission study has been performed for Pr1-xSrxMnO3(x=1/3,1/2) and the partial spectral weight (PSW) distributions of both Pr 4f and Mn 3d electrons have been determined. With varying temperature (T) and x, metal-insulator transitions are observed in the photoemission data. The Pr ions in Pr1-xSrxMnO3 are trivalent, and Pr 4f PSW exhibits a dominant hybridization peak indicating large Pr 4f-O2p mixing. The Mn 3d PSW at low T shows a charge gap for x=1/2, and a reduced spectral intensity near EF for x=1/3, suggesting the localized nature due to the lattice polaron formation.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.60.13257
DOI:
10.1103/PhysRevB.60.13257
PACS:
75.30.Vn, 71.30.+h, 79.60.-i
 
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