Highly Stable Two-level Current Fluctuation in Complex Oxide Heterostructures

Doyeop Kim, Jung-Woo Lee, Jihyun Lim, Sungjun Choi, Khimananda Acharya, Seobin Oh, Jaewhan Oh, Tula R. Paudel, Yongsoo Yang, Kitae Eom, Sunwoo Lee*, Hyungwoo Lee*

Nature Communications, 2025

This work demonstrates a room-temperature-stable two-level quantum system in SrRuO3/LaAlO3/Nb-doped SrTiO3 heterostructures—arising from Coulomb coupling between antisite Ti defects and oxygen vacancies—that generates stable random telegraph noise usable as an entropy source for random bit-strings, validated in a practical stochastic machine learning application for image super-resolution.

BibTeX

@article{kim2025highly,
  title={Highly stable two-level current fluctuation in complex oxide heterostructures},
  author={Kim, Doyeop and Lee, Jung-Woo and Lim, Jihyun and Choi, Sungjun and Acharya, Khimananda and Oh, Seobin and Oh, Jaewhan and Paudel, Tula R and Yang, Yongsoo and Eom, Kitae and others},
  journal={Nature Communications},
  volume={16},
  number={1},
  pages={5459},
  year={2025},
  publisher={Nature Publishing Group UK London}
}