Modulation of the Superconducting Phase Transition in Multilayer 2H-NbSe<sub>2</sub> Induced by Uniform Biaxial Compressive Strain.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39075987.
- Also identified by DOI 10.1021/acs.nanolett.4c02421 and PMC identifier 11363131.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Strain is a powerful tool for tuning the properties of two-dimensional materials. Here, we investigated the effects of large, uniform biaxial compressive strain on the superconducting phase transition of multilayered 2H-NbSe<sub>2</sub> flakes. We observed a consistent decrease in the critical temperature of NbSe<sub>2</sub> flakes induced by the large thermal compression of a polymeric substrate (>1.2%) at cryogenic temperatures. For thin flakes (∼10 nm thick), a strong modulation of the critical temperature up to 1.5 K is observed, which monotonically decreases with increasing flake thickness. The effects of biaxial compressive strain remain significant even for relatively thick samples up to 80 nm thick, indicating efficient transfer of strain not only from the substrate to the flakes but also across several van der Waals layers. This work demonstrates that compressive strain induced from substrate thermal deformation can effectively tune phase transitions at low temperatures in 2D materials.