ON THE QUANTUM HALL EFFECT IN GRAPHENE
2009 ◽
Vol 23
(20n21)
◽
pp. 4129-4137
Keyword(s):
The unusual quantum Hall effect (QHE) in graphene is often discussed in terms of Dirac fermions moving with a linear dispersion. A new theory describing the same phenomena is presented in terms of the more traditional composite bosons. The "electron" (wave packet) is shown to move easier in the direction [110] ≡ [110 c- axis ] of the honeycomb lattice than perpendicular to it, while the "hole" moves easier in [001]. Since "electrons" and "holes" move in different channels, the number densities can be very high especially when the Fermi surface has "necks". The strong QHE at filling factor ν = 2 arises from the "neck" Fermi surfaces.
Keyword(s):
2015 ◽
Vol 27
(18)
◽
pp. 185301
◽
1998 ◽
Vol 249-251
◽
pp. 75-78
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Keyword(s):
2016 ◽
Vol 85
(6)
◽
pp. 064712
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