Lithography-Defined Semiconductor Moirés with Anomalous In-Gap Quantum Hall States
Quantum materials and phenomena have attracted great interest for their potential applications in next-generation microelectronics and quantum-information technologies. In one especially interesting class of quantum materials, moiré superlattices (MSLs) formed by twisted bilayers of 2D materials, a wide range of novel phenomena are observed. However, there exist daunting challenges such as reproducibility and scalability of utilizing 2D MSLs for microelectronics and quantum technologies due to their exfoliate-tear-stack method. Here, we propose lithography-defined semiconductor MSLs, in which three fundamental parameters─electron-electron interaction, spin-orbit coupling, and band topology─are designable. We experimentally investigate quantum-transport properties in a moiré specimen made in an InAs quantum well. Strong anomalous in-gap states are observed within the same integer quantum Hall state. Our work opens up new horizons for studying 2D quantum-materials phenomena in semiconductors featuring superior industry-level quality and state-of-the-art technologies, and they may potentially enable new quantum-information and microelectronics technologies.
Authors
- John F. Klem (ORCID: https://orcid.org/0000-0002-0598-5780)
- Chang Niu (ORCID: https://orcid.org/0000-0003-3175-7164)
- Mykhaylo Ozerov (ORCID: https://orcid.org/0000-0002-5470-1158)
- Samuel D. Hawkins (ORCID: https://orcid.org/0000-0002-4705-1628)
- Komalavalli Thirunavukkuarasu (ORCID: https://orcid.org/0000-0001-6148-2670)
- Catalin D. Spataru (ORCID: https://orcid.org/0000-0001-8039-0755)
- David Bruce Burckel (ORCID: https://orcid.org/0000-0003-2222-047X)
- Aaron J. Muhowski (ORCID: https://orcid.org/0000-0002-5659-6136)
- Keshab Sapkota (ORCID: https://orcid.org/0000-0001-8581-4211)
- Peide D. Ye (ORCID: https://orcid.org/0000-0001-8466-9745)
- Fan Zhang (ORCID: https://orcid.org/0000-0003-4623-4200)
- Dmitry Smirnov (ORCID: https://orcid.org/0000-0001-6358-3221)
- W. Pan (ORCID: https://orcid.org/0000-0002-5629-5296)
- Zachery A. Enderson (ORCID: https://orcid.org/0000-0002-4919-8770)
- Zhigang Jiang (ORCID: https://orcid.org/0000-0001-9884-3337)
- Lee Smith (ORCID: https://orcid.org/0000-0003-1846-8050)
- Li Xiang (ORCID: https://orcid.org/0000-0002-1565-0271)
- P. Frank Pai
- Doyle A. Temple
Institutions
- Norfolk State University (US)
- Oak Ridge Associated Universities (US)
- Oak Ridge National Laboratory (US)
- Georgia Institute of Technology (US)
- The University of Texas at Dallas (US)
- Sandia National Laboratories California (US)
- Purdue University West Lafayette (US)
- Sandia National Laboratories (US)
- National High Magnetic Field Laboratory (US)
- Oak Ridge Institute for Science and Education
- Florida Agricultural and Mechanical University (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-06-06
- DOI
- https://doi.org/10.1021/acs.nanolett.5c02180
- Citations
- 1
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.25
Funders
- Division of Materials Research
- Basic Energy Sciences
- Laboratory Directed Research and Development