Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Imaging of low-compressibility strips in the quantum Hall liquid G. Finkelstein, P.I. Glicofridis, S.H. Tessmer,* and R.C. Ashoori
 

Summary: Imaging of low-compressibility strips in the quantum Hall liquid
G. Finkelstein, P.I. Glicofridis, S.H. Tessmer,* and R.C. Ashoori
Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology,
Cambridge, Massachusetts 02139
M. R. Melloch
School of Electrical Engineering, Purdue University, West Lafayette, Indiana 47907
Received 29 March 2000
Using subsurface charge accumulation scanning microscopy, we image strips of low compressibility corre-
sponding to several integer quantum Hall filling factors. We study in detail the strips at Landau level filling
factors 2 and 4. The observed strips appear significantly wider than predicted by theory. We present a
model accounting for the discrepancy by considering a disorder-induced nonzero density of states in the
cyclotron gap.
Many of the key features observed in the quantum Hall
effect may be explained in terms of the transport through the
quasi-one-dimensional edge channels.1
Each channel is
formed where the energy of the corresponding Landau level
at the edge of the sample equals the Fermi energy. Theories
predict that the edge channels should be separated by narrow
strips with precisely integer Landau level filling factor.2,3

  

Source: Ashoori, Raymond - Department of Physics, Massachusetts Institute of Technology (MIT)
Finkelstein, Gleb - Department of Physics, Duke University

 

Collections: Physics