2017/07/04 by Yuhe Tang, Anthony Tylan‐Tyler, Anthony Tylan-Tyler +15
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Coulomb #Coupling (piping) #Diamond and Carbon-based Materials Research #Drag #Electron #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Materials science #Mechanics #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Mesoscopic physics #Nanotechnology #Nanowire #Physics #Quantum mechanics #Range (aeronautics) #Semiconductor materials and devices #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1707.01171
10 pages, 4 figures
openalex publication_date 2017/07/04 · arxiv created 2018/12/30 · arxiv updated 2019/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The LaAlO3/SrTiO3 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 LaAlO3/SrTiO3 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 LaAlO3/SrTiO3 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.