Structural stability and electronic properties of graphene/germanene heterobilayer
In this work, the structural and electronic properties of graphene/germanene heterobilayer is investigated by using density functional theory. We find that the graphene and germanene are bounded together mainly by weak van der Waal forces. This is supported by small interlayer binding energy of grap...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379721006483 |
| _version_ | 1831581945453084672 |
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| author | Mohamad Amin Bin Hamid Kar Tim Chan Chong Heng Raymond Ooi Hishamuddin Zainuddin Nurisya Mohd Shah Nazirul Nazrin Shahrol Nidzam |
| author_facet | Mohamad Amin Bin Hamid Kar Tim Chan Chong Heng Raymond Ooi Hishamuddin Zainuddin Nurisya Mohd Shah Nazirul Nazrin Shahrol Nidzam |
| author_sort | Mohamad Amin Bin Hamid |
| collection | DOAJ |
| description | In this work, the structural and electronic properties of graphene/germanene heterobilayer is investigated by using density functional theory. We find that the graphene and germanene are bounded together mainly by weak van der Waal forces. This is supported by small interlayer binding energy of graphene/germanene heterobilayer. In the heterobilayer, the Dirac cone characteristics of both graphene and germanene layers are well preserved. The band gap opening is found due to the unsaturated pz-orbital of germanene layer. Further variation of compressive strain along the normal of the heterobilayer increases the band gap opening in the heterobilayer. Inhomogeneous charge redistribution is found in between graphene and germanene layer, where small charge accumulation region is found in germanene layer while charge depletion region in graphene layer. The total charge accumulations in between graphene and germanene sheets is 5.645 × 10−4 e. |
| first_indexed | 2024-12-17T20:14:38Z |
| format | Article |
| id | doaj.art-8f181797d7e34642b8d2ac1c599d073c |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-17T20:14:38Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-8f181797d7e34642b8d2ac1c599d073c2022-12-21T21:34:08ZengElsevierResults in Physics2211-37972021-09-0128104545Structural stability and electronic properties of graphene/germanene heterobilayerMohamad Amin Bin Hamid0Kar Tim Chan1Chong Heng Raymond Ooi2Hishamuddin Zainuddin3Nurisya Mohd Shah4Nazirul Nazrin Shahrol Nidzam5Institute for Mathematical Research (INSPEM), Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, MalaysiaInstitute for Mathematical Research (INSPEM), Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Corresponding author.Department of Physics, University of Malaya, 50603 Kuala Lumpur, MalaysiaInstitute for Mathematical Research (INSPEM), Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, MalaysiaInstitute for Mathematical Research (INSPEM), Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, MalaysiaInstitut Kejora, 31750 Tronoh, Perak, MalaysiaIn this work, the structural and electronic properties of graphene/germanene heterobilayer is investigated by using density functional theory. We find that the graphene and germanene are bounded together mainly by weak van der Waal forces. This is supported by small interlayer binding energy of graphene/germanene heterobilayer. In the heterobilayer, the Dirac cone characteristics of both graphene and germanene layers are well preserved. The band gap opening is found due to the unsaturated pz-orbital of germanene layer. Further variation of compressive strain along the normal of the heterobilayer increases the band gap opening in the heterobilayer. Inhomogeneous charge redistribution is found in between graphene and germanene layer, where small charge accumulation region is found in germanene layer while charge depletion region in graphene layer. The total charge accumulations in between graphene and germanene sheets is 5.645 × 10−4 e.http://www.sciencedirect.com/science/article/pii/S2211379721006483Density functional theoryGrapheneGermaneneTwo-dimensional materialsHeterobilayer |
| spellingShingle | Mohamad Amin Bin Hamid Kar Tim Chan Chong Heng Raymond Ooi Hishamuddin Zainuddin Nurisya Mohd Shah Nazirul Nazrin Shahrol Nidzam Structural stability and electronic properties of graphene/germanene heterobilayer Results in Physics Density functional theory Graphene Germanene Two-dimensional materials Heterobilayer |
| title | Structural stability and electronic properties of graphene/germanene heterobilayer |
| title_full | Structural stability and electronic properties of graphene/germanene heterobilayer |
| title_fullStr | Structural stability and electronic properties of graphene/germanene heterobilayer |
| title_full_unstemmed | Structural stability and electronic properties of graphene/germanene heterobilayer |
| title_short | Structural stability and electronic properties of graphene/germanene heterobilayer |
| title_sort | structural stability and electronic properties of graphene germanene heterobilayer |
| topic | Density functional theory Graphene Germanene Two-dimensional materials Heterobilayer |
| url | http://www.sciencedirect.com/science/article/pii/S2211379721006483 |
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