Float-up picture of extended levels in the integer quantum Hall effect: A numerical study | Zendy

D. N. Sheng | Zendy; Zheng-Yu Weng | Zendy; Xiao-Gang Wen | Zendy

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Float-up picture of extended levels in the integer quantum Hall effect: A numerical study

Author(s) -

D. N. Sheng,

Zheng-Yu Weng,

Xiao-Gang Wen

Publication year - 2001

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.64.165317

Subject(s) - quantum hall effect , condensed matter physics , physics , quantum spin hall effect , magnetic field , scaling , quantum phase transition , phase diagram , quantum , quantum mechanics , conductance , phase transition , phase (matter) , mathematics , geometry

The fate of the integer quantum Hall effect (IQHE) at weak magnetic field is studied numerically in the presence of correlated disorders. We find a systematic float-up and merging picture for extended levels on the low-energy side which results in direct transitions from higher-plateau IQHE states to the insulator. Such direct transitions are controlled by a quantum critical point with a universal scaling form of conductance. The phase diagram is in good agreement with recent experiments

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