TY - JOUR
T1 - Exact density of states of the lowest Landau level in a spin- system with uncorrelated disorders
AU - Tu, Ming Hsien
AU - Yang, Min Fong
PY - 1997
Y1 - 1997
N2 - Using the path-integral approach developed by Brézin, Gross, and Itzykson [Nucl. Phys. B 235, 24 (1984)], we obtain an analytical expression for the density of states of a spin- disordered two-dimensional electron gas in a strong, perpendicular magnetic field. The density of states of this system illustrates the interplay between the Zeeman splitting of Landau levels and the disorder-induced broadening. We find that the broadening and the band splitting of the Landau bands are enhanced due to the level repulsion from the mixing of two spin orientations caused by the random scatterings. The comparison between the spin- model and the double-layer system is also discussed.
AB - Using the path-integral approach developed by Brézin, Gross, and Itzykson [Nucl. Phys. B 235, 24 (1984)], we obtain an analytical expression for the density of states of a spin- disordered two-dimensional electron gas in a strong, perpendicular magnetic field. The density of states of this system illustrates the interplay between the Zeeman splitting of Landau levels and the disorder-induced broadening. We find that the broadening and the band splitting of the Landau bands are enhanced due to the level repulsion from the mixing of two spin orientations caused by the random scatterings. The comparison between the spin- model and the double-layer system is also discussed.
UR - http://www.scopus.com/inward/record.url?scp=0007117153&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.55.5205
DO - 10.1103/PhysRevB.55.5205
M3 - 文章
AN - SCOPUS:0007117153
SN - 1098-0121
VL - 55
SP - 5205
EP - 5213
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 8
ER -