Electronic structure of single-crystalline Mg(x)Al(1-x)B(2)

S. Schuppler; E. Pellegrin; N. Nuecker; T. Mizokawa; M. Merz; D. A. Arena; J. Dvorak; Y. U. Idzerda; D. -J. Huang; C. -F. Cheng; K. -P. Bohnen; R. Heid; P. Schweiss; Th. Wolf

Electronic structure of single-crystalline Mg(x)Al(1-x)B(2)

Superconductivity 2007-05-23 v1

Authors: S. Schuppler , E. Pellegrin , N. Nuecker , T. Mizokawa , M. Merz , D. A. Arena , J. Dvorak , Y. U. Idzerda , D. -J. Huang , C. -F. Cheng , K. -P. Bohnen , R. Heid , P. Schweiss , Th. Wolf

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Abstract

Polarization-dependent x-ray absorption spectroscopy at the B 1s edge of single-crystalline Mg(x)Al(1-x)B(2) reveals a strongly anisotropic electronic structure near the Fermi energy. Comparing spectra for superconducting compounds (x=0.9, 1.0) with those for the non-superconductor x=0.0 gives direct evidence on the importance of an in-plane spectral feature crossing E_F for the superconducting properties of the diborides. Good agreement is found with the projected B 2p density of states from LDA band structure calculations.

Keywords

electronic structure MgB2 x-ray absorption spectroscopy Fermi surface superconductivity

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@article{arxiv.cond-mat/0205230,
  title  = {Electronic structure of single-crystalline Mg(x)Al(1-x)B(2)},
  author = {S. Schuppler and E. Pellegrin and N. Nuecker and T. Mizokawa and M. Merz and D. A. Arena and J. Dvorak and Y. U. Idzerda and D. -J. Huang and C. -F. Cheng and K. -P. Bohnen and R. Heid and P. Schweiss and Th. Wolf},
  journal= {arXiv preprint arXiv:cond-mat/0205230},
  year   = {2007}
}

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4 pages, 1 figure, 1 table

Electronic structure of single-crystalline Mg(x)Al(1-x)B(2)

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