corner
corner
APS » Journals » Phys. Rev. B » Volume 68 » Issue 1
< Previous Article | Next Article >

Phys. Rev. B 68, 012410 (2003) [4 pages]

Resonant photoemission spectroscopy study of impurity-induced melting in Cr- and Ru-doped Nd1/2A1/2MnO3(A=Ca,Sr)

Download: PDF (426 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. -S. Kang1, J. H. Kim1, A. Sekiyama2, S. Kasai2, S. Suga2, S. W. Han3, K. H. Kim3, E. J. Choi4, T. Kimura5, T. Muro6, Y. Saitoh7, C. G. Olson8, J. H. Shim9, and B. I. Min9
1Department of Physics, The Catholic University of Korea, Puchon 420-743, Korea
2Department of Material Physics, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
3Department of Physics, Gyeongsang National University, Chinju 660-701, Korea
4Department of Physics, The University of Seoul, Seoul 130-743, Korea
5Department of Applied Physics, University of Tokyo, Tokyo 113-0033, Japan
6JASRI, SPring-8, Hyogo 679-5198, Japan
7Department of Synchrotron Radiation Research, JAERI, SPring-8, Hyogo 679-5148, Japan
8Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA
9Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea

Received 12 May 2003; published 28 July 2003

Electronic structures of very dilute Cr- or Ru-doped Nd1/2A1/2MnO3 (NAMO) (A=Ca,Sr) manganites have been investigated using the Mn and Cr 2p⃗3d resonant photoemission spectroscopy (PES). All the Cr- and Ru-doped NAMO systems exhibit the clear metallic Fermi edges in the Mn eg spectra near EF, consistent with their metallic ground states. The Cr 3d states with t2g3 configuration are at ∼1.3eV below EF, and the Cr eg states do not participate in the formation of the band near EF. Cr- and Ru-induced ferromagnetism and insulator-to-metal transitions can be understood based on their measured electronic structures.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.68.012410
DOI:
10.1103/PhysRevB.68.012410
PACS:
75.47.De, 79.60.-i, 71.30.+h
 
< Previous Article | Next Article >