Laterally modulated 2D electron system in the extreme quantum limit.
We report on magnetotransport of a two-dimensional electron system (2DES), located 32 nm below the surface, with a surface superlattice gate structure of periodicity 39 nm imposing a periodic modulation of its potential. For low Landau level fillings nu, the diagonal resistivity displays a rich pattern of fluctuations, even though the disorder dominates over the periodic modulation. Theoretical arguments based on the combined effects of the long-wavelength, strong disorder and the short-wavelength, weak periodic modulation present in the 2DES qualitatively explain the data.
Melinte
S
S
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Berciu
Mona
M
Zhou
Chenggang
C
Tutuc
E
E
Papadakis
S J
SJ
Harrison
C
C
De Poortere
E P
EP
Wu
Mingshaw
M
Chaikin
P M
PM
Shayegan
M
M
Bhatt
R N
RN
Register
R A
RA