Imaging of low-compressibility strips in the quantum Hall liquid
نویسندگان
چکیده
Using subsurface charge accumulation scanning microscopy, we image strips of low compressibility corresponding to several integer quantum Hall filling factors. We study in detail the strips at Landau level filling factors n52 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.
منابع مشابه
Pii: S0038-1098(99)00139-8
Microscopic images of the local electron compressibility, electrostatic potential, and current-induced Hall voltage of a twodimensional sheet of electrons in the quantum Hall regime are acquired using a single-electron transistor as a scanned probe. Regions identified as differing in quantum state (Landau level) occupancy of the electrons appear in interrelated ways in all of these properties. ...
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تاریخ انتشار 1999