DOI: 10.1126/science.abm5734. Ferroelectricity in untwisted heterobilayers of transition metal dichalcogenides

Ferroelectricity in untwisted heterobilayers of transition metal dichalcogenides

10.1126/science.abm5734

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Two-dimensional materials with out-of-plane (OOP) ferroelectric and piezoelectric properties are highly desirable for the realization of ultrathin ferro- and piezoelectronic devices. We demonstrate unexpected OOP ferroelectricity and piezoelectricity in untwisted, commensurate, and epitaxial MoS 2 /WS 2 heterobilayers synthesized by scalable one-step chemical vapor deposition. We show d 33 piezoelectric constants of 1.95 to 2.09 picometers per volt that are larger than the natural OOP piezoelectric constant of monolayer In 2 Se 3 by a factor of ~6. We demonstrate the modulation of tunneling current by about three orders of magnitude in ferroelectric tunnel junction devices by changing the polarization state of MoS 2 /WS 2 heterobilayers. Our results are consistent with density functional theory, which shows that both symmetry breaking and interlayer sliding give rise to the unexpected properties without the need for invoking twist angles or moiré domains.

Bibliography

RogÃ©e, L., Wang, L., Zhang, Y., Cai, S., Wang, P., Chhowalla, M., Ji, W., & Lau, S. P. (2022). Ferroelectricity in untwisted heterobilayers of transition metal dichalcogenides. Science, 376(6596), 973â978.

Authors 8

Lukas Rogée (first)
Lvjin Wang (additional)
Yi Zhang (additional)
Songhua Cai (additional)
Peng Wang (additional)
Manish Chhowalla (additional)
Wei Ji (additional)
Shu Ping Lau (additional)

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Dates

Type	When
Created	3 years, 2 months ago (May 26, 2022, 1:57 p.m.)
Deposited	1 year, 7 months ago (Jan. 15, 2024, 7:14 p.m.)
Indexed	2 minutes ago (Aug. 21, 2025, 6:50 a.m.)
Issued	3 years, 2 months ago (May 27, 2022)
Published	3 years, 2 months ago (May 27, 2022)
Published Print	3 years, 2 months ago (May 27, 2022)

Funders 0

None

BibTeX

@article{Rog_e_2022, title={Ferroelectricity in untwisted heterobilayers of transition metal dichalcogenides}, volume={376}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.abm5734}, DOI={10.1126/science.abm5734}, number={6596}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Rogée, Lukas and Wang, Lvjin and Zhang, Yi and Cai, Songhua and Wang, Peng and Chhowalla, Manish and Ji, Wei and Lau, Shu Ping}, year={2022}, month=may, pages={973–978} }

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