Long-range non-Coulombic electron-electron interactions between coupled LaAlO\(_3\)/SrTiO\(_3\) nanowires

The LaAlO\(_3\)/SrTiO\(_3\) system exhibits unusual magnetic and superconducting behavior arising from electron-electron interactions whose physical origin is not well understood. Quantum transport techniques, especially those involving mesoscopic geometries, can offer insight into these interaction...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Tang, Yuhe, Tylan-Tyler, Anthony, Lee, Hyungwoo, Tomczyk, Michelle, Huang, Mengchen, Chang-Beom Eom, Irvin, Patrick, Levy, Jeremy
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 30.12.2018
Subjects
Drag
Electric wire
Electrons
Nanowires
Quantum transport
Separation
Online AccessGet full text

Cover

More Information
Summary:The LaAlO\(_3\)/SrTiO\(_3\) system exhibits unusual magnetic and superconducting behavior arising from electron-electron interactions whose physical origin is not well understood. Quantum transport techniques, especially those involving mesoscopic geometries, can offer insight into these interactions. Here we report evidence for long-range electron-electron interactions in LaAlO\(_3\)/SrTiO\(_3\) nanowires, measured through the phenomenon of frictional drag, in which current passing through one nanowire induces a voltage across a nearby electrically isolated nanowire. Frictional drag mediated by the Coulomb interaction is predicted to decay exponentially with interwire separation, but with the LaAlO\(_3\)/SrTiO\(_3\) nanowire system it is found to be nearly independent of separation. Frictional drag experiments performed with three parallel wires demonstrates long-range frictional coupling even in the presence of an electrically grounded central wire. Collectively, these results provides evidence for a new long-range non-Coulombic electron-electron interaction unlike anything previously reported for semiconducting systems.
ISSN:2331-8422