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28 March 2024
 
  » arxiv » cond-mat/0103593

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Soft x-ray spectroscopy measurements of the p-like density of states of B in MgB2 and evidence for surface boron oxides on exposed surfaces
T. A. Callcott ; L. Lin ; G. T. Woods ; G. P. Zhang ; J. R. Thompson ; M. Paranthaman ; D. L. Ederer ;
Date 28 Mar 2001
Subject Superconductivity | cond-mat.supr-con
Affiliation1,2), M. Paranthaman, and D. L. Ederer ( The University of Tennessee, Knoxville, TN, Oak Ridge National Laboratory, Oak ridge, TN, Tulane University, New Orleans, LA
AbstractSoft X-ray absorption and fluorescence measurements are reported for the K-edge of B in MgB2. The measurements confirm a high density of B pxy(sigma)-states at the Fermi edge and extending to approximately 0.9 eV above the edge. A strong resonance is observed in elastic scattering through a core-exciton derived from out-of-plane pz(pi*)-states. Another strong resonance, observed in both elastic and inelastic spectra, is identified as a product of surface boron oxides.
Source arXiv, cond-mat/0103593
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