Encoding multistate charge order and chirality in endotaxial heterostructures
Abstract
High-density phase change memory (PCM) storage is proposed for materials with multiple intermediate resistance states, which have been observed in 1T-TaS2 due to charge density wave (CDW) phase transitions. However, the metastability responsible for this behavior makes the presence of multistate switching unpredictable in TaS2 devices. Here, we demonstrate the fabrication of nanothick verti-lateral H-TaS2/1T-TaS2 heterostructures in which the number of endotaxial metallic H-TaS2 monolayers dictates the number of resistance transitions in 1T-TaS2 lamellae near room temperature. Further, we also observe optically active heterochirality in the CDW superlattice structure, which is modulated in concert with the resistivity steps, and we show how strain engineering can be used to nucleate these polytype conversions. This work positions the principle of endotaxial heterostructures as a promising conceptual framework for reliable, non-volatile, and multi-level switching of structure, chirality, and resistance.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 27, 2023
- Source ID
- 10.1038/s41467-023-41780-y
Entities
People
- Alberto Mier
- Berit H. Goodge
- Colin Ophus
- Daniel Kwabena Bediako
- Karen C Bustillo
- Katherine Inzani
- Kenji Watanabe
- Matthew P. Erodici
- Samra Husremović
- Sinéad Griffin
- Stephanie M. Ribet
- Takashi Taniguchi
Organizations
- Air Force Office of Scientific Research
- Canadian Institute for Advanced Research
- Engineering and Physical Sciences Research Council
- Gordon and Betty Moore Foundation
- Japan Society for the Promotion of Science
- Office of Basic Energy Sciences
- Office of Naval Research
- University of California