Engineered spin-orbit interactions in LaAlO 3 /SrTiO 3 -based 1D serpentine electron waveguides

Briggeman, Megan; Li, Jianan; Huang, Mengchen; Lee, Hyungwoo; Lee, Jung-Woo; Eom, Kitae; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy

doi:10.1126/sciadv.aba6337

Title: Engineered spin-orbit interactions in LaAlO ₃ /SrTiO ₃ -based 1D serpentine electron waveguides

Journal Article · Fri Nov 27 00:00:00 EST 2020 · Science Advances

DOI:https://doi.org/10.1126/sciadv.aba6337· OSTI ID:1724274

^[1]; Li, Jianan ^[1]; Huang, Mengchen ^[1]; Lee, Hyungwoo ^[2];

^[2];

^[1];

^[1]

Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA., Pittsburgh Quantum Institute, Pittsburgh, PA 15260, USA.
Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.

The quest to understand, design, and synthesize new forms of quantum matter guides much of contemporary research in condensed matter physics. One-dimensional (1D) electronic systems form the basis for some of the most interesting and exotic phases of quantum matter. Here, we describe a family of quasi-1D nanostructures, based on LaAlO₃/SrTiO₃ electron waveguides, in which a sinusoidal transverse spatial modulation is imposed. These devices display unique dispersive features in the subband spectra, namely, a sizeable shift (~7 T) in the spin-dependent subband minima, and fractional conductance plateaus. The first property can be understood as an engineered spin-orbit interaction associated with the periodic acceleration of electrons as they undulate through the nanowire (ballistically), while the second property signifies the presence of enhanced electron-electron scattering in this system. The ability to engineer these interactions in quantum wires contributes to the tool set of a 1D solid-state quantum simulation platform.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States); Univ. of Pittsburgh, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-06ER46327; SC0014417

OSTI ID:: 1724274

Alternate ID(s):: OSTI ID: 1816217

Journal Information:: Science Advances, Journal Name: Science Advances Vol. 6 Journal Issue: 48; ISSN 2375-2548

Publisher:: American Association for the Advancement of Science (AAAS)Copyright Statement

Country of Publication:: United States

Language:: English

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