TY - JOUR
T1 - Anomalous orbital magnetism in Dirac-electron systems
T2 - Role of pseudospin paramagnetism
AU - Koshino, Mikito
AU - Ando, Tsuneya
PY - 2010/5/25
Y1 - 2010/5/25
N2 - The orbital diamagnetic susceptibility is calculated in monolayer and bilayer graphenes with band gap as well as in three-dimensional Dirac systems. It is demonstrated that the pseudospin degree of freedom such as valleys produces paramagnetic susceptibility analogous to contribution from real spin, and it dominates over the Landau diamagnetism. The pseudospin paramagnetism explains the origin of a singular diamagnetism which is present only in the band-gap region and disappears rapidly inside the conduction and valence bands.
AB - The orbital diamagnetic susceptibility is calculated in monolayer and bilayer graphenes with band gap as well as in three-dimensional Dirac systems. It is demonstrated that the pseudospin degree of freedom such as valleys produces paramagnetic susceptibility analogous to contribution from real spin, and it dominates over the Landau diamagnetism. The pseudospin paramagnetism explains the origin of a singular diamagnetism which is present only in the band-gap region and disappears rapidly inside the conduction and valence bands.
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U2 - 10.1103/PhysRevB.81.195431
DO - 10.1103/PhysRevB.81.195431
M3 - Article
AN - SCOPUS:77955678598
SN - 0163-1829
VL - 81
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
M1 - 195431
ER -