TY - JOUR
T1 - Detection of compressible and incompressible states in quantum dots and antidots by far-infrared spectroscopy
AU - Bollweg, K.
AU - Kurth, T.
AU - Heitmann, D.
AU - Gudmundsson, V.
AU - Vasiliadou, E.
AU - Grambow, P.
AU - Eberl, K.
PY - 1996/4/8
Y1 - 1996/4/8
N2 - In arrays of Al x Ga 1-x As -GaAs quantum dots and antidots we observe, with far-infrared spectroscopy for increasing magnetic field, huge (up to 20%) oscillations of the resonance frequency of the edge-magnetoplasmon-like mode.At fully occupied Landau levels the frequency has a maximum for the dots, and the reverse behavior, a minimum, for the antidots.We show that this is caused by the formation of compressible and incompressible stripes at the edges of the dots and antidots.
AB - In arrays of Al x Ga 1-x As -GaAs quantum dots and antidots we observe, with far-infrared spectroscopy for increasing magnetic field, huge (up to 20%) oscillations of the resonance frequency of the edge-magnetoplasmon-like mode.At fully occupied Landau levels the frequency has a maximum for the dots, and the reverse behavior, a minimum, for the antidots.We show that this is caused by the formation of compressible and incompressible stripes at the edges of the dots and antidots.
UR - http://www.scopus.com/inward/record.url?scp=0000239612&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.76.2774
DO - 10.1103/PhysRevLett.76.2774
M3 - Article
AN - SCOPUS:0000239612
SN - 0031-9007
VL - 76
SP - 2774
EP - 2777
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
ER -