Imaging of localized electronic states in the quantum Hall regime

Article Abstract:

The quantum Hall effect is examined in the context of a manifestation of localized states. Localized potential signals were observed, oscillating with changing electron density.

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Four-terminal resistance of a ballistic quantum wire

Article Abstract:

Research into the electrical resistance of ballistic quantum one-dimensional wires is described. Four-terminal resistance measurements were carried out, showing that the electrical contact is the cause of any resistance.

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High-resolution spectroscopy of two-dimensional electron systems

Article Abstract:

An improved version of time-domain capacitance spectroscopy that enables measurement of single-particle density of states of a two-dimensional electron system with unprecedented fidelity and resolution is presented.

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