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Investigation of the Band Structure of Diamond Using Low‐Energy Electrons
Author(s) -
Maguire H. G.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220760233
Subject(s) - diamond , brillouin zone , atomic physics , electronic band structure , electron , auger , spectral line , ionization , band gap , auger effect , auger electron spectroscopy , emission spectrum , ionization energy , chemistry , materials science , condensed matter physics , physics , ion , optoelectronics , organic chemistry , astronomy , nuclear physics , quantum mechanics
Secondary electron emission measurements performed in a conventional UHV LEED/Auger chamber are used to investigate the band structural characteristics of type IA diamond. The Auger spectrum obtained reflects structure in the valence band and compliments the techniques of X‐ray photoemission spectroscopy and soft X‐ray emission. Characteristic loss spectra reveals greater detail than hitherto and confirms some of the earlier optical measurements. K‐shell ionisation spectra confirms theoretical predictions of two conduction bands in diamond separated by a well defined energy gap, and reveals the structure associated with these bands. Low‐energy secondary emission resulting from interband transitions, and stimulated by incident electrons of energy below the K‐shell ionization energy, is observed to correlate with band structure calculations, and also confirms the presence of an energy gap separating two conduction bands. In addition, it provides a means for investigating the energy eigenvalues at various k ‐points within an elementary region of the Brillouin zone.