Pascal conductance series in ballistic one-dimensional LaAlO3/SrTiO3 channels
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 (LaAlO3/SrTiO3) interface. The waveguide conductance follows a characteristic sequence within Pascal’s triangle: (1, 3, 6, 10, 15, …) ṡ e2/h, where e is the electron charge and h is the Planck constant. This behavior is consistent with the existence of a family of degenerate quantum liquids formed from bound states of n = 2, 3, 4, … electrons. Our experimental setup could provide a setting for solid-state analogs of a wide range of composite fermionic phases.
- Publication:
-
Science
- Pub Date:
- February 2020
- DOI:
- 10.1126/science.aat6467
- arXiv:
- arXiv:1909.05698
- Bibcode:
- 2020Sci...367..769B
- Keywords:
-
- PHYSICS;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- doi:10.1126/science.aat6467