Moiré reconstruction at a twisted SrTiO3 interface

Abstract

Twisted oxide double layers have emerged as a promising platform for exploring moiré physics, including polar topologies and emergent electronic phases. However, the intrinsic complexity of oxide surfaces, such as contamination, roughness, and the presence of two distinct terminations (AO and BO2), can complicate the identification of buried interfacial structures. Here, using atomically flat SrTiO3 membranes with a predominantly SrO-TiO2 interfacial configuration, we directly visualize a moiré-periodic structural reconstruction at the buried interface that is distinct from the geometric moiré of rigid stacking. The reconstructed interface hosts head-to-head-like polar distortions, moiré-modulated Ti electronic structure, and enhanced microwave admittance in otherwise paraelectric and insulating SrTiO3. Our work demonstrates that, with a well-defined termination, moiré reconstruction could serve as a route to emergent electrical behavior in twisted perovskite oxides.

Moiré droplet of ultracold Bose gases in a twisted-bilayer optical lattice
Tianqi Luo, Jing Zhang, Xiaoling Cui
arXiv24 Sep 2026PreprintarXiv licenceFull textAtomic, molecular & optical physics Condensed matterarXiv
Moiré Topology in Twisted Structures with Noncollinear Spin-Orbit Coupling
Xilong Xu, Liangtao Peng, Shaffique Adam +1
arXiv9 Sep 2026PreprintCC BY 4.0Full textCondensed matterarXiv
Moiré-enabled chiral plasmons in twisted bilayer graphene nanoislands
Magnus Husted, Viktor Kanstrup, Eduardo J. C. Dias +1
arXiv29 Oct 2026PreprintarXiv licenceFull textCondensed matter Optics & photonicsarXiv
Electrostatic Doping of Moiré Superlattices Controls the Optical Fingerprint of a WSe_2 /Twisted Bilayer Graphene heterostructure
Houssem Eddine Hannachi, Sihem Jaziri
arXiv2 Oct 2026PreprintarXiv licenceFull textCondensed matterarXiv
Topological Fingerprints of Commensurate Order in Twisted Moiré Lattices
Collin J. Kovacs, Jiangxu Li, Yang Zhang +3
arXiv23 Sep 2026PreprintarXiv licenceFull textCondensed matterarXiv

Cite

BibTeX RIS

BibTeX

@misc{fei2026moiré,
  title = {{Moiré reconstruction at a twisted SrTiO3 interface}},
  author = {Pengcheng Fei and Meiyu Wang and Suzhen Liu and Zhongwei Zhang and Yang Wu and Bo Hao and Hanhao Zhang and Dingcheng Ma and Shijie Yang and Weiye Nie and Jiacheng Wang and Jibo Xu and Geliang Shen and Junjie Wang and Chi Ding and Huifeng Chen and Sheng Xu and Xinrui Yang and Lu Han and Haocheng Quan and Ling-Ling Ma and Zaiyao Fei and Liqi Zhou and Songhua Cai and Zhengbin Gu and Yu Deng and Jian Sun and Di Wu and Yuefeng Nie},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.02464},
  eprint = {2611.02464},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.02464},
}

RIS

TY  - UNPB
TI  - Moiré reconstruction at a twisted SrTiO3 interface
AU  - Pengcheng Fei
AU  - Meiyu Wang
AU  - Suzhen Liu
AU  - Zhongwei Zhang
AU  - Yang Wu
AU  - Bo Hao
AU  - Hanhao Zhang
AU  - Dingcheng Ma
AU  - Shijie Yang
AU  - Weiye Nie
AU  - Jiacheng Wang
AU  - Jibo Xu
AU  - Geliang Shen
AU  - Junjie Wang
AU  - Chi Ding
AU  - Huifeng Chen
AU  - Sheng Xu
AU  - Xinrui Yang
AU  - Lu Han
AU  - Haocheng Quan
AU  - Ling-Ling Ma
AU  - Zaiyao Fei
AU  - Liqi Zhou
AU  - Songhua Cai
AU  - Zhengbin Gu
AU  - Yu Deng
AU  - Jian Sun
AU  - Di Wu
AU  - Yuefeng Nie
PY  - 2026
DA  - 2026/11/02
PB  - arXiv
DO  - 10.48550/arxiv.2611.02464
UR  - https://arxiv.org/abs/2611.02464
AB  - Twisted oxide double layers have emerged as a promising platform for exploring moiré physics, including polar topologies and emergent electronic phases. However, the intrinsic complexity of oxide surfaces, such as contamination, roughness, and the presence of two distinct terminations (AO and BO2), can complicate the identification of buried interfacial structures. Here, using atomically flat SrTiO3 membranes with a predominantly SrO-TiO2 interfacial configuration, we directly visualize a moiré-periodic structural reconstruction at the buried interface that is distinct from the geometric moiré of rigid stacking. The reconstructed interface hosts head-to-head-like polar distortions, moiré-modulated Ti electronic structure, and enhanced microwave admittance in otherwise paraelectric and insulating SrTiO3. Our work demonstrates that, with a well-defined termination, moiré reconstruction could serve as a route to emergent electrical behavior in twisted perovskite oxides.
ER  -

Abstract

Related

Cite