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Quantum conductance: Difference between revisions
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Quantum point contacts (QPCs) are narrow constrictions between two wider electron reservoirs. They are commonly used to study quantum conductance. When the width of the QPC is comparable to the electron wavelength, the conductance becomes quantized. This quantization is observed as a series of plateaus in the conductance versus gate voltage plot, with each plateau corresponding to an integer multiple of \( G_0 \). | Quantum point contacts (QPCs) are narrow constrictions between two wider electron reservoirs. They are commonly used to study quantum conductance. When the width of the QPC is comparable to the electron wavelength, the conductance becomes quantized. This quantization is observed as a series of plateaus in the conductance versus gate voltage plot, with each plateau corresponding to an integer multiple of \( G_0 \). | ||
[[Image:Detail-92787.jpg|thumb|center|A quantum point contact device under a microscope.]] | [[Image:Detail-92787.jpg|thumb|center|A quantum point contact device under a microscope.|class=only_on_mobile]] | ||
[[Image:Detail-92788.jpg|thumb|center|A quantum point contact device under a microscope.|class=only_on_desktop]] | |||
=== Quantum Dots === | === Quantum Dots === | ||