TY - JOUR
T1 - Quantum hall transition in real space
T2 - From localized to extended states
AU - Hashimoto, K.
AU - Sohrmann, C.
AU - Wiebe, J.
AU - Inaoka, T.
AU - Meier, F.
AU - Hirayama, Y.
AU - Römer, R. A.
AU - Wiesendanger, R.
AU - Morgenstern, M.
PY - 2008/12/15
Y1 - 2008/12/15
N2 - Using scanning tunneling spectroscopy in an ultrahigh vacuum at low temperature (T=0.3K) and high magnetic fields (B≤12T), we directly probe electronic wave functions across an integer quantum Hall transition. In accordance with theoretical predictions, we observe the evolution from localized drift states in the insulating phases to branched extended drift states at the quantum critical point. The observed microscopic behavior close to the extended state indicates points of localized quantum tunneling, which are considered to be decisive for a quantitative description of the transition.
AB - Using scanning tunneling spectroscopy in an ultrahigh vacuum at low temperature (T=0.3K) and high magnetic fields (B≤12T), we directly probe electronic wave functions across an integer quantum Hall transition. In accordance with theoretical predictions, we observe the evolution from localized drift states in the insulating phases to branched extended drift states at the quantum critical point. The observed microscopic behavior close to the extended state indicates points of localized quantum tunneling, which are considered to be decisive for a quantitative description of the transition.
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U2 - 10.1103/PhysRevLett.101.256802
DO - 10.1103/PhysRevLett.101.256802
M3 - Article
AN - SCOPUS:57949113920
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
M1 - 256802
ER -