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Observations of conduction-band structure of4H- and6H−SiC
Physical Review B (Condensed Matter)
Ballistic electron-emission spectroscopy ͑BEES͒ and photoluminescence are used to study conduction-band structure related transport properties of the 4H and 6H polytypes of SiC. A secondary energy threshold at 2.7 eV is observed in the BEES spectrum of 4H-SiC, in good agreement with a value of 2.8 eV deduced from reported ab initio calculations. The results from 6H-SiC, are suggested to be influenced by transport properties of other polytype inclusions, also supported by band-edge transitions evident in 6H-SiC photoluminescence spectra.doi:10.1103/physrevb.65.073104 fatcat:adhpzcmtdvhgdbt22syeczdjhu