Year: 2025
Type: article
Abstract: 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.
Source: Nano Letters
Authors: Wei Pan, D. Bruce Burckel, Catalin D. Spataru, Keshab R. Sapkota, Aaron J. Muhowski, Samuel D. Hawkins, John F. Klem, Layla S. Smith, Doyle A. Temple, Zachery A. Enderson, Zhigang Jiang, Komalavalli Thirunavukkuarasu, Li Xiang, Mykhaylo Ozerov, Dmitry Smirnov, Chang Niu, Peide D. Ye, Praveen Pai, Fan Zhang
Institutions: Sandia National Laboratories California, Sandia National Laboratories, Norfolk State University, Georgia Institute of Technology, Oak Ridge Institute for Science and Education, National High Magnetic Field Laboratory, Florida Agricultural and Mechanical University, Purdue University West Lafayette, The University of Texas at Dallas
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: National Science Foundation, U.S. Department of Energy, National High Magnetic Field Laboratory, Center for Integrated Nanotechnologies, Division of Materials Research, Basic Energy Sciences, Laboratory Directed Research and Development, High Magnetic Field Laboratory, Chinese Academy of Sciences, Sandia National Laboratories
Awards: G1019936685, G1094001048, G1218430875, G1450738401, G222768804, G2328029904, INCORPORATION OF THE HYBRID COORDINATE OCEAN MODEL (HYCOM) INTO THE COMMUNITY CLIMATE SYSTEM MODEL (CCSM): EVALUATION AND CLIMATE APPLICATIONS, Collaborative Research: Correlated Phases in an Unusual Family of Crystalline 2D Materials, G5020515, CAREER: Realization, Manipulation, and Interaction of Majorana Kramers Pairs, G6004699919, National High Magnetic Field Laboratory Renewal 2023-2027, G742574937, Collaborative Research: DMREF: Developing and Harnessing the Platform of Quasi-One-Dimensional Topological Materials for Novel Functionalities and Devices, G8152425740, G8618556185, INFRARED OPTICAL STUDY OF GRAPHENE IN HIGH MAGNETIC FIELDS
OpenAlex ID: W4411095263