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

2002/05/10 by S. Schuppler, Schuppler, S., E. Pellegrin +25
Physics and Astronomy · #FOS: Physical sciences #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0205230

4 pages, 1 figure, 1 table

arxiv created 2002/05/10 · arxiv updated 2009/11/30

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.

Related

• Electron energy-loss spectroscopy study of electron-doping in MgB₂
• Electronic Structure, Bonding and Optical Spectrum of MgB2
• Superconductivity in MgB2 and TaB2: A Full-Potential Electronic Structure Comparison
• The band structure of hexagonal diborides ZrB2, VB2, NbB2 and TaB2 in comparison with the superconducting MgB2
• A Point-Contact Study of the Superconducting Gaps in Al-Substituted and C-Substituted MgB₂ Single Crystals