Strain Tunable Quantum Oscillations at the LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Interface

ORAL

Abstract

The correlated oxide interface LaAlO3/SrTiO3 (LAO/STO) manifests distinctive emergent phenomena, including quantum oscillations[1], strong Rashaba spin-orbit coupling[2] (SOC), and electron pairing without superconductivity[3]. These properties can usually be tuned by electric and magnetic fields and temperature. Here we realize a continuous strain tunning of the LAO/STO interface at 1.5 K through a homemade amplified strain cell. Consequently, an ultra-low-field quantum oscillation gradually emerges as carrier density and mobility are greatly tuned by the compressive strain. Further combined with a milli-Kelvin atomic force microscope, our platform is promising to explore strain tunable behaviors in real space and by quantum transport at oxide interfaces.

*This work is supported by the National Natural Science Foundation of China under grant No. NSFC 11874054 and the University of Science and Technology of China under Grant No. WK3540000003, KY2030000160 and YD3540002001.

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Publication: [1] G. Cheng. et al., Shubnikov–de haas–like quantum oscillations in artificial one-dimensional LaAlO3/SrTiO3 electron channels. Phys. Rev. Lett. 120, 076801
[2] A. D. Caviglia. et al., Tunable Rashba Spin-Orbit Interaction at Oxide Interfaces. Phys. Rev. Lett. 104, 126803
[3] G. Cheng. et al., Electron pairing without superconductivity. Nature 521, 196-199 (2015).

Presenters

  • Mengke Ha

    • University of Science and Technology of China

Authors

  • Mengke Ha

    • University of Science and Technology of China

  • Qianyi Zhao

    • University of Science and Technology of China

  • Chengyuan Huang

    • University of Science and Technology of China

  • Zhenlan Chen

    • University of Science and Technology of China

  • Zhiyuan Qin

    • University of Science and Technology of China

  • Dawei Qiu

    • University of Science and Technology of

  • Qing Xiao

    • University of Science and Technology of China

  • Changjian Ma

    • University of Science and Technology of China

  • Danqing Liu

    • University of Science and Technology of China

  • Guanglei Cheng

    • University of Science and Technology of China