Electronic structure of layered perovskite-related Sr1-yLayNbO3.5-x

Kuntscher, C. A. ; Gerhold, S. ; Nücker, N. ; Cummins, T. R. ; Lu, D.-H. ; Schuppler, S. ; Gopinath, C. S. ; Lichtenberg, F. ; Mannhart, J. ; Bohnen, K.-P. (2000) Electronic structure of layered perovskite-related Sr1-yLayNbO3.5-x Physical Review B: Condensed Matter and Materials Physics, 61 (3). pp. 1876-1883. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v61/i3/p1876_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.61.1876


The electronic properties and the crystal structure of layered perovskite-related niobates Sr1-yLayNbO3.5-x can be tuned by gradually changing the oxygen stoichiometry. We have studied the electronic structure of this series in detail by angle-integrated and angle-resolved (ARPES) photoemission and x-ray absorption (NEXAFS) on SrNbO3.45 and La0.1Sr0.9NbO3.39 single crystals. ARPES shows a one-dimensional dispersion and a purely one-dimensional Fermi surface with a nesting vector 2kF=0.56Å−1. A strongly anisotropic electronic character appears in polarization-dependent O 1s NEXAFS as well. Local-density approximation (LDA) band-structure calculations support this dispersion behavior of the lowest-lying conduction band and find additional Fermi surface sheets with a more two-dimensional character.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:61796
Deposited On:15 Sep 2011 12:08
Last Modified:15 Sep 2011 12:08

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