Imaging and identification of point defects in PtTe2
Abstract The properties and performance of two-dimensional (2D) materials can be greatly affected by point defects. PtTe2, a 2D material that belongs to the group 10 transition metal dichalcogenides, is a type-II Dirac semimetal, which has gained a lot of attention recently due to its potential for...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-01-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-020-00196-8 |
| _version_ | 1818430955589730304 |
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| author | Kuanysh Zhussupbekov Lida Ansari John B. McManus Ainur Zhussupbekova Igor V. Shvets Georg S. Duesberg Paul K. Hurley Farzan Gity Cormac Ó Coileáin Niall McEvoy |
| author_facet | Kuanysh Zhussupbekov Lida Ansari John B. McManus Ainur Zhussupbekova Igor V. Shvets Georg S. Duesberg Paul K. Hurley Farzan Gity Cormac Ó Coileáin Niall McEvoy |
| author_sort | Kuanysh Zhussupbekov |
| collection | DOAJ |
| description | Abstract The properties and performance of two-dimensional (2D) materials can be greatly affected by point defects. PtTe2, a 2D material that belongs to the group 10 transition metal dichalcogenides, is a type-II Dirac semimetal, which has gained a lot of attention recently due to its potential for applications in catalysis, photonics, and spintronics. Here, we provide an experimental and theoretical investigation of point defects on and near the surface of PtTe2. Using scanning tunneling microscopy and scanning tunneling spectroscopy (STS) measurements, in combination with first-principle calculations, we identify and characterize five common surface and subsurface point defects. The influence of these defects on the electronic structure of PtTe2 is explored in detail through grid STS measurements and complementary density functional theory calculations. We believe these findings will be of significance to future efforts to engineer point defects in PtTe2, which is an interesting and enticing approach to tune the charge-carrier mobility and electron–hole recombination rates, as well as the site reactivity for catalysis. |
| first_indexed | 2024-12-14T15:41:38Z |
| format | Article |
| id | doaj.art-99413918247847fca1d023415606afd3 |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-12-14T15:41:38Z |
| publishDate | 2021-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-99413918247847fca1d023415606afd32022-12-21T22:55:37ZengNature Portfolionpj 2D Materials and Applications2397-71322021-01-015111010.1038/s41699-020-00196-8Imaging and identification of point defects in PtTe2Kuanysh Zhussupbekov0Lida Ansari1John B. McManus2Ainur Zhussupbekova3Igor V. Shvets4Georg S. Duesberg5Paul K. Hurley6Farzan Gity7Cormac Ó Coileáin8Niall McEvoy9School of Physics, Trinity College DublinNanoelectronics Materials and Devices, Tyndall National Institute, University College CorkAMBER Centre, CRANN Institute, Trinity College DublinSchool of Physics, Trinity College DublinSchool of Physics, Trinity College DublinSchool of Chemistry, Trinity College DublinAMBER Centre, CRANN Institute, Trinity College DublinNanoelectronics Materials and Devices, Tyndall National Institute, University College CorkAMBER Centre, CRANN Institute, Trinity College DublinAMBER Centre, CRANN Institute, Trinity College DublinAbstract The properties and performance of two-dimensional (2D) materials can be greatly affected by point defects. PtTe2, a 2D material that belongs to the group 10 transition metal dichalcogenides, is a type-II Dirac semimetal, which has gained a lot of attention recently due to its potential for applications in catalysis, photonics, and spintronics. Here, we provide an experimental and theoretical investigation of point defects on and near the surface of PtTe2. Using scanning tunneling microscopy and scanning tunneling spectroscopy (STS) measurements, in combination with first-principle calculations, we identify and characterize five common surface and subsurface point defects. The influence of these defects on the electronic structure of PtTe2 is explored in detail through grid STS measurements and complementary density functional theory calculations. We believe these findings will be of significance to future efforts to engineer point defects in PtTe2, which is an interesting and enticing approach to tune the charge-carrier mobility and electron–hole recombination rates, as well as the site reactivity for catalysis.https://doi.org/10.1038/s41699-020-00196-8 |
| spellingShingle | Kuanysh Zhussupbekov Lida Ansari John B. McManus Ainur Zhussupbekova Igor V. Shvets Georg S. Duesberg Paul K. Hurley Farzan Gity Cormac Ó Coileáin Niall McEvoy Imaging and identification of point defects in PtTe2 npj 2D Materials and Applications |
| title | Imaging and identification of point defects in PtTe2 |
| title_full | Imaging and identification of point defects in PtTe2 |
| title_fullStr | Imaging and identification of point defects in PtTe2 |
| title_full_unstemmed | Imaging and identification of point defects in PtTe2 |
| title_short | Imaging and identification of point defects in PtTe2 |
| title_sort | imaging and identification of point defects in ptte2 |
| url | https://doi.org/10.1038/s41699-020-00196-8 |
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