Intrinsic Piezoelectricity in Two-Dimensional Materials
| Autor: | Evan J. Reed, Mitchell T. Ong, Karel-Alexander N. Duerloo |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Condensed matter physics Nanotechnology Piezoelectricity chemistry.chemical_compound chemistry Macroscopic scale Boron nitride visual_art Piezotronics Monolayer Electronic component visual_art.visual_art_medium General Materials Science Physical and Theoretical Chemistry Order of magnitude Wurtzite crystal structure |
| Zdroj: | The Journal of Physical Chemistry Letters. 3:2871-2876 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/jz3012436 |
| Popis: | We discovered that many of the commonly studied two-dimensional monolayer transition metal dichalcogenide (TMDC) nanoscale materials are piezoelectric, unlike their bulk parent crystals. On the macroscopic scale, piezoelectricity is widely used to achieve robust electromechanical coupling in a rich variety of sensors and actuators. Remarkably, our density-functional theory calculations of the piezoelectric coefficients of monolayer BN, MoS2, MoSe2, MoTe2, WS2, WSe2, and WTe2 reveal that some of these materials exhibit stronger piezoelectric coupling than traditionally employed bulk wurtzite structures. We find that the piezoelectric coefficients span more than 1 order of magnitude, and exhibit monotonic periodic trends. The discovery of this property in many two-dimensional materials enables active sensing, actuating, and new electronic components for nanoscale devices based on the familiar piezoelectric effect. |
| Databáze: | OpenAIRE |
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