Pascal conductance series in ballistic one-dimensional LaAlO 3 /SrTiO 3 channels
Abstract
Effects of correlations between electrons are enhanced in systems of reduced dimensions. The two-dimensional interface between two oxide materials, lanthanum aluminate (LaAlO 3 ) and strontium titanate (SrTiO 3 ), exhibits magnetism and superconductivity. In even lower-dimensional systems fabricated in similar heterostructures, electrons can pair without going superconducting. Briggeman et al. have now observed another exotic effect in LaAlO 3 /SrTiO 3 waveguides: At certain magnetic fields, the conductance in these one-dimensional systems exhibits steps of an unconventional sequence. To understand the experimental data, the researchers used a model that accounted for interactions between electrons and found that the phenomenology was consistent with the formation of a series of correlated phases characterized by bound states of three or more electrons.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 14, 2020
- Source ID
- 10.1126/science.aat6467
Entities
People
- Anthony Tylan-Tyler
- Binbin Tian
- Chang-Beom Eom
- David Pekker
- Hyungwoo Lee
- Jeremy Levy
- Jung-Woo Lee
- Megan Briggeman
- Mengchen Huang
- Michelle Tomczyk
- Patrick Irvin
- Roger S. K. Mong
- Yuchi He
Organizations
- Carnegie Mellon University
- National Science Foundation
- Office of Naval Research
- Pittsburgh Quantum Institute
- United States Department of Energy
- University of Pittsburgh
- University of Wisconsin–Madison