Stacking-Dependent Correlated Gap and Kondo Peak in the Heterophase Bilayer with Picometer-Level Interlayer Shift
Two-dimensional heterojunctions provide a versatile platform for exploring various quantum properties. Here, we create bilayer 1T/2H-NbSe<sub>2</sub> heterophase junctions and realize two types of stacking configurations with picometer-level lattice shifts. By high-resolution scanning tunneling microscopy/spectroscopy, we found that the electronic states are highly dependent on the stacking configurations of the 1T layer on the 2H one. Unexpectedly, a tiny shift between the two configurations (about 110 pm in the lateral direction and 30 pm in the vertical one) leads to a change from a correlated gap lattice into a Kondo peak lattice. Moreover, both of them show a spin-related pseudogap width of 2-3 meV close to the Fermi level, which splits under the external magnetic field. Our study demonstrates the important role of delicate stacking configurations on the many-body physics and spin-related phenomena in the heterophase junctions.
Authors
- Huixia Yang (ORCID: https://orcid.org/0000-0002-6007-6686)
- Fawei Zheng (ORCID: https://orcid.org/0000-0002-1716-0225)
- Han Yang (ORCID: https://orcid.org/0000-0002-2038-2144)
- Yeliang Wang (ORCID: https://orcid.org/0000-0002-8896-0748)
- Xuan Song (ORCID: https://orcid.org/0000-0003-4042-7888)
- Liwei Liu (ORCID: https://orcid.org/0000-0001-5884-7333)
- Zexuan Liu (ORCID: https://orcid.org/0000-0001-9453-457X)
- Yuan Bo Huang (ORCID: https://orcid.org/0000-0002-7005-1319)
- Yugui Yao (ORCID: https://orcid.org/0000-0003-3544-3787)
- Kai Yang (ORCID: https://orcid.org/0000-0002-5863-3666)
- Jia‐Tao Sun (ORCID: https://orcid.org/0000-0003-3519-352X)
- Si Chen (ORCID: https://orcid.org/0000-0002-4292-4151)
- Yaoyao Chen (ORCID: https://orcid.org/0009-0006-8897-5284)
Institutions
- Beijing Institute of Technology (CN)
- Chinese Academy of Sciences (CN)
- Integrated Optoelectronics (Norway) (NO)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Beihang University (CN)
- Ministry of Industry and Information Technology (CN)
Publication Details
- Journal
- ACS Nano
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1021/acsnano.4c16830
- Citations
- 1
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 1.26
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China