Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session E16: Transport in Nanostructures -- Nanoscale Transport I
8:00 AM–11:00 AM,
Tuesday, March 5, 2019
BCEC
Room: 155
Sponsoring
Unit:
DMP
Chair: Han Htoon, Los Alamos National Laboratory
Abstract: E16.00002 : Shot-Noise Measurements of Waveguides with Attractive Electron-Electron Interactions*
8:12 AM–8:24 AM
Presenter:
Muqing Yu
(University of Pittsburgh)
Authors:
Muqing Yu
(University of Pittsburgh)
Yun-Yi Pai
(University of Pittsburgh)
Leena Aggarwal
(University of Pittsburgh)
Hyungwoo Lee
(Department of Materials Science and Engineering, University of Wisconsin-Madison)
Jungwoo Lee
(Department of Materials Science and Engineering, University of Wisconsin-Madison)
Chang-Beom Eom
(Department of Materials Science and Engineering, University of Wisconsin-Madison)
Patrick Irvin
(University of Pittsburgh)
Jeremy Levy
(University of Pittsburgh)
Mesoscopic devices created at oxide interfaces, such as the LaAlO3/SrTiO3 heterostructure [1], exhibit a wide range of exotic behavior that is linked to a strong electron-electron interaction. Electron pairing without superconductivity [2] 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.
[1] Y.-Y. Pai, A. Tylan-Tyler, P. Irvin, and J. Levy, Rep Prog Phys 81, 036503 (2018).
[2] G. Cheng et al., Nature 521, 196 (2015).
*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).
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