Stacking Polymorphism in PtSe2 Drastically Affects Its Electromechanical Properties

Roman Kempt, Sebastian Lukas, Oliver Hartwig, Maximilian Prechtl, Agnieszka Kuc, Thomas Brumme, Sha Li, Daniel Neumaier, Max C. Lemme, Georg S. Duesberg, Thomas Heine

Research output: Contribution to journalArticlepeer-review

Abstract

PtSe2 is one of the most promising materials for the next generation of piezoresistive sensors. However, the large-scale synthesis of homogeneous thin films with reproducible electromechanical properties is challenging due to polycrystallinity. It is shown that stacking phases other than the 1T phase become thermodynamically available at elevated temperatures that are common during synthesis. It is shown that these phases can make up a significant fraction in a polycrystalline thin film and discuss methods to characterize them, including their Seebeck coefficients. Lastly, their gauge factors, which vary strongly and heavily impact the performance of a nanoelectromechanical device are estimated.

Original languageEnglish
Article number2201272
JournalAdvanced Science
Volume9
Issue number22
DOIs
Publication statusPublished - 2022 Aug 5

Bibliographical note

Funding Information:
This work was financially supported by the German Ministry of Education and Research (BMBF) under the project ForMikro-NobleNEMS (16ES1121). The authors thank the Center for Information Services and High-Performance Computing (ZIH) at TU Dresden for generous allocations of computer time. The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) for funding this project by providing computing time through the John von Neumann Institute for Computing (NIC) on the GCS Supercomputer JUWELS at Jülich Supercomputing Centre (JSC). They also thank CRC 1415 for support. They thank Desislava Daskalova (AMO GmbH) for assistance with UV/Vis spectrometry measurements. They thank Louis Stuber for his technical support and Florian Knoop and Thomas Purcell for fruitful discussions regarding phonon calculations. They thank Jesús Carrete Montaña for fruitful discussions regarding the Seebeck measurement.

Funding Information:
This work was financially supported by the German Ministry of Education and Research (BMBF) under the project ForMikro‐NobleNEMS (16ES1121). The authors thank the Center for Information Services and High‐Performance Computing (ZIH) at TU Dresden for generous allocations of computer time. The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss‐centre.eu) for funding this project by providing computing time through the John von Neumann Institute for Computing (NIC) on the GCS Supercomputer JUWELS at Jülich Supercomputing Centre (JSC). They also thank CRC 1415 for support. They thank Desislava Daskalova (AMO GmbH) for assistance with UV/Vis spectrometry measurements. They thank Louis Stuber for his technical support and Florian Knoop and Thomas Purcell for fruitful discussions regarding phonon calculations. They thank Jesús Carrete Montaña for fruitful discussions regarding the Seebeck measurement.

Publisher Copyright:
© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Engineering(all)
  • Physics and Astronomy(all)

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