Pascal conductance series in ballistic one-dimensional LaAlO<sub>3</sub>/SrTiO<sub>3</sub> channels.
basic_science · Level V
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- Record sourced from PubMed, PMID 32054758.
- Also identified by DOI 10.1126/science.aat6467.
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Abstract
One-dimensional electronic systems can support exotic collective phases because of the enhanced role of electron correlations. We describe the experimental observation of a series of quantized conductance steps within strongly interacting electron waveguides formed at the lanthanum aluminate-strontium titanate (LaAlO<sub>3</sub>/SrTiO<sub>3</sub>) interface. The waveguide conductance follows a characteristic sequence within Pascal's triangle: (1, 3, 6, 10, 15, …) ⋅ <i>e</i> <sup>2</sup> <i>/h</i>, where <i>e</i> is the electron charge and <i>h</i> is the Planck constant. This behavior is consistent with the existence of a family of degenerate quantum liquids formed from bound states of <i>n</i> = 2, 3, 4, … electrons. Our experimental setup could provide a setting for solid-state analogs of a wide range of composite fermionic phases.