Effect of Trigonal Warping on Landau Levels of Graphite

✍ Scribed by O. P. Gupta; P. R. Wallace

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 394 KB
• Volume: 54
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220540103

✦ Synopsis

Abstract

We have devised a successive approximation scheme for taking account of the trigonal warping (γ~3~) terms in the calculation of the lower‐lying magnetic levels of graphite at fields ⩾ 20 kG. A two‐component effective Hamiltonian has been introduced for these levels. Starting from analytic expressions in the case γ;~3~ = 0, straightforward and simple iteration schemes have been devised (i) to take account of the higher levels and (ii) to obtain the γ~3~ contributions. It is found that the trigonal warping changes the levels only by a few per cent except for the n = 0 levels. The levels n = 0, 1, 2, 3 have been calculated for a range of fields from 20 to 200 kG.