Shot-Noise Measurements of Waveguides with Attractive Electron-Electron Interactions
Abstract
Mesoscopic devices created at oxide interfaces, such as the LaAlO3/SrTiO3 heterostructure, exhibit a wide range of exotic behavior that is linked to a strong electron-electron interaction. Electron pairing without superconductivity involves transport of charge-2e carriers and higher-order ``Pascal'' phases with charge ne (n > 2), have been identified in quantum transport measurements. One way to gain further insight to these phases would be to verify the existence of quantized charge by measuring shot noise. Here we describe experimental efforts to reveal shot-noise characteristics in electron waveguide devices whose electronic phases that can be tuned between paired and unpaired state via tuning of magnetic field and chemical potential. These shot noise measurements have the potential to confirm the charge of these exotic electron liquid phases and provide insight into their phase diagrams.
JL acknowledges a Vannevar Bush Faculty Fellowship, funded by ONR (N00014-15-1-2847). C-BE acknowledges NSF DMREF (DMR-1629270), AFOSR (FA9550-15-1-0334), and AOARD (FA2386-15-1-4046).- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARE16002Y