Local Interface Effects Modulate Global Charge Order and Optical Properties of 1<i>T</i>–TaS<sub>2</sub>/1<i>H</i>–WSe<sub>2</sub> Heterostructures
1<i>T</i>-TaS<sub>2</sub> is a layered charge density wave (CDW) crystal exhibiting sharp phase transitions and associated resistance changes. These resistance steps could be exploited for information storage, underscoring the importance of controlling and tuning the CDW states. Given the importance of out-of-plane interactions in 1<i>T</i>-TaS<sub>2</sub>, modulating interlayer interactions by heterostructuring is a promising method for tailoring CDW phase transitions. In this work, we investigate the optical and electronic properties of heterostructures comprising 1<i>T</i>-TaS<sub>2</sub> and monolayer 1<i>H</i>-WSe<sub>2</sub>. By systematically varying the thickness of 1<i>T</i>-TaS<sub>2</sub> and its azimuthal alignment with 1<i>H</i>-WSe<sub>2</sub>, we find that intrinsic moiré strain and interfacial charge transfer introduce CDW disorder in 1<i>T</i>-TaS<sub>2</sub> and modify the CDW ordering temperature. Furthermore, our studies reveal that the interlayer alignment impacts the exciton dynamics in 1<i>H</i>-WSe<sub>2</sub>, indicating that heterostructuring can concurrently tailor the electronic phases in 1<i>T</i>-TaS<sub>2</sub> and the optical properties of 1<i>H</i>-WSe<sub>2</sub>. This work presents a promising approach for engineering the optoelectronic behavior of heterostructures that integrate CDW materials and semiconductors.
Authors
- Madeline Van Winkle (ORCID: https://orcid.org/0000-0001-5772-2723)
- Sae Hee Ryu (ORCID: https://orcid.org/0000-0003-3207-7582)
- Eli Rotenberg (ORCID: https://orcid.org/0000-0002-3979-8844)
- Medha Dandu (ORCID: https://orcid.org/0000-0002-5548-2882)
- Archana Raja (ORCID: https://orcid.org/0000-0001-8906-549X)
- Oscar González (ORCID: https://orcid.org/0000-0001-7660-1767)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Chris M. Jozwiak (ORCID: https://orcid.org/0000-0002-0980-3753)
- Katherine Inzani (ORCID: https://orcid.org/0000-0002-3117-3188)
- Aaron Bostwick (ORCID: https://orcid.org/0000-0002-9008-2980)
- Shannon S. Fender (ORCID: https://orcid.org/0000-0002-9895-5539)
- Samra Husremović (ORCID: https://orcid.org/0000-0002-4741-3780)
- Lilia S. Xie (ORCID: https://orcid.org/0000-0001-5249-4952)
- Valerie S. McGraw (ORCID: https://orcid.org/0000-0001-5520-6741)
- D. Kwabena Bediako (ORCID: https://orcid.org/0000-0003-0064-9814)
- Karen C. Bustillo (ORCID: https://orcid.org/0000-0002-2096-6078)
Institutions
- University of Nottingham (GB)
- Lawrence Berkeley National Laboratory (US)
- National Institute for Materials Science (JP)
- University of California System (US)
- Kavli Energy NanoScience Institute (US)
- NOAA Chemical Sciences Laboratory (US)
- Foundry (United Kingdom) (GB)
- Advanced Light Source
- Molecular Foundry
- University of California, Berkeley (US)
Publication Details
- Journal
- ACS Nano
- Published
- 2025-09-01
- DOI
- https://doi.org/10.1021/acsnano.5c06759
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- U.S. Department of Defense
- Arnold and Mabel Beckman Foundation
- Blavatnik Family Foundation
- Ministry of Education, Culture, Sports, Science and Technology
- Engineering and Physical Sciences Research Council
- Japan Society for the Promotion of Science
- Basic Energy Sciences
- Core Research for Evolutional Science and Technology