Shubnikov-de Haas-like Quantum Oscillations in Artificial One-Dimensional LaAlO3/SrTiO3 Electron Channels

Abstract

The widely reported magnetoresistance oscillations in LaAlO3/SrTiO3 heterostructures have invariably been attributed to the Shubnikov-de Haas (SdH) effect, despite a pronounced inconsistency with low-field Hall resistance measurements. Here we report SdH-like resistance oscillations in quasi-1D electron waveguides created at the LaAlO3/SrTiO3 interface by conductive atomic force microscopy lithography. These oscillations can be directly attributed to magnetic depopulation of magnetoelectric subbands. Our results suggest that the SdH oscillations in 2D SrTiO3-based systems may originate from naturally forming quasi-1D channels.

arXiv comment16 pages, 4 figures

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Cited by in corpus (11)

• Aperiodic quantum oscillations in the two-dimensional electron gas at the LaAlO3/SrTiO3 interface
• Engineered spin-orbit interactions in LaAlO${}_3$/SrTiO${}_3$-based 1D serpentine electron waveguides
• Non-universal current flow near the metal-insulator transition in an oxide interface
• Quantum oscillations in 2D electron gases with spin-orbit and Zeeman interactions
• Electron Pairing and Nematicity in LaAlO${}_3$/SrTiO${}_3$ Nanostructures
• Domain wall nature of sketched LaAlO3/SrTiO3 nanowires
• Unconventional quantum oscillations and evidence of nonparabolic electronic states in quasi-two-dimensional electron system at complex oxide interfaces
• Strong Aharonov-Bohm quantum interference in simply-connected LaAlO${}_3$/SrTiO${}_3$ structures
• A Milli-Kelvin Atomic Force Microscope Made of Glass
• High-quality Nano-patterning of Oxide Interfaces Using Transferred Gold Mask
• Reconfigurable Oxide Nanoelectronics by Tip-induced Electron Delocalization