Document Detail

Robust nodal structure of landau level wave functions revealed by fourier transform scanning tunneling spectroscopy.
MedLine Citation:
PMID:  23005665     Owner:  NLM     Status:  In-Data-Review    
Scanning tunneling spectroscopy is used to study the real-space local density of states of a two-dimensional electron system in a magnetic field, in particular within higher Landau levels. By Fourier transforming the local density of states, we find a set of n radial minima at fixed momenta for the nth Landau levels. The momenta of the minima depend only on the inverse magnetic length. By comparison with analytical theory and numerical simulations, we attribute the minima to the nodes of the quantum cyclotron orbits, which decouple in a Fourier representation from the random guiding center motion due to disorder. Adequate Fourier filtering reveals the nodal structure in real space in some areas of the sample with relatively smooth potential disorder.
K Hashimoto; T Champel; S Florens; C Sohrmann; J Wiebe; Y Hirayama; R A Römer; R Wiesendanger; M Morgenstern
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Publication Detail:
Type:  Journal Article     Date:  2012-09-12
Journal Detail:
Title:  Physical review letters     Volume:  109     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  116805     Citation Subset:  IM    
Department of Physics, Tohoku University, Sendai 980-8578, Japan and JST, ERATO Nuclear Spin Electronics Project, Sendai 980-8578, Japan.
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