First-principles studies on the superconductivity of aluminene
Group III mono-elemental two-dimensional (2D) materials have been an active area of research since the experimental demonstration of monolayer boron. Using first-principles calculations, we predict a new type of buckled monolayer aluminum (aluminene) which exhibits metallic characteristics. From the...
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| Format: | Article |
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Elsevier
2018
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| author | Yeoh, Keat Hoe Yoon, Tiem Leong Rusi, - Ong, Duu Sheng Lim, Thong Leng |
| author_facet | Yeoh, Keat Hoe Yoon, Tiem Leong Rusi, - Ong, Duu Sheng Lim, Thong Leng |
| author_sort | Yeoh, Keat Hoe |
| collection | UM |
| description | Group III mono-elemental two-dimensional (2D) materials have been an active area of research since the experimental demonstration of monolayer boron. Using first-principles calculations, we predict a new type of buckled monolayer aluminum (aluminene) which exhibits metallic characteristics. From the phonon dispersion and cohesive energy calculations, the free-standing aluminene is structurally stable. The stability of the aluminene is maintained under tensile strain up to 7%. In contrast, the stability of the structure is not preserved in the presence of compressive strain. We also carried out a systematic analysis on the electron–phonon coupling in the aluminene structure and found that aluminene in its pristine form can superconduct with superconductivity critical temperature, Tc of 6.5 K. The Tc is further enhanced to 11.9 K with the presence of 7% bi-axial tensile strain. Our calculations show that the higher Tc is because of stronger electron–phonon coupling resulted from the increase of density of states at Fermi level with tensile strain. |
| first_indexed | 2024-03-06T05:50:44Z |
| format | Article |
| id | um.eprints-20278 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:50:44Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-202782019-02-12T09:06:46Z http://eprints.um.edu.my/20278/ First-principles studies on the superconductivity of aluminene Yeoh, Keat Hoe Yoon, Tiem Leong Rusi, - Ong, Duu Sheng Lim, Thong Leng TK Electrical engineering. Electronics Nuclear engineering Group III mono-elemental two-dimensional (2D) materials have been an active area of research since the experimental demonstration of monolayer boron. Using first-principles calculations, we predict a new type of buckled monolayer aluminum (aluminene) which exhibits metallic characteristics. From the phonon dispersion and cohesive energy calculations, the free-standing aluminene is structurally stable. The stability of the aluminene is maintained under tensile strain up to 7%. In contrast, the stability of the structure is not preserved in the presence of compressive strain. We also carried out a systematic analysis on the electron–phonon coupling in the aluminene structure and found that aluminene in its pristine form can superconduct with superconductivity critical temperature, Tc of 6.5 K. The Tc is further enhanced to 11.9 K with the presence of 7% bi-axial tensile strain. Our calculations show that the higher Tc is because of stronger electron–phonon coupling resulted from the increase of density of states at Fermi level with tensile strain. Elsevier 2018 Article PeerReviewed Yeoh, Keat Hoe and Yoon, Tiem Leong and Rusi, - and Ong, Duu Sheng and Lim, Thong Leng (2018) First-principles studies on the superconductivity of aluminene. Applied Surface Science, 445. pp. 161-166. ISSN 0169-4332, DOI https://doi.org/10.1016/j.apsusc.2018.03.133 <https://doi.org/10.1016/j.apsusc.2018.03.133>. https://doi.org/10.1016/j.apsusc.2018.03.133 doi:10.1016/j.apsusc.2018.03.133 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Yeoh, Keat Hoe Yoon, Tiem Leong Rusi, - Ong, Duu Sheng Lim, Thong Leng First-principles studies on the superconductivity of aluminene |
| title | First-principles studies on the superconductivity of aluminene |
| title_full | First-principles studies on the superconductivity of aluminene |
| title_fullStr | First-principles studies on the superconductivity of aluminene |
| title_full_unstemmed | First-principles studies on the superconductivity of aluminene |
| title_short | First-principles studies on the superconductivity of aluminene |
| title_sort | first principles studies on the superconductivity of aluminene |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| work_keys_str_mv | AT yeohkeathoe firstprinciplesstudiesonthesuperconductivityofaluminene AT yoontiemleong firstprinciplesstudiesonthesuperconductivityofaluminene AT rusi firstprinciplesstudiesonthesuperconductivityofaluminene AT ongduusheng firstprinciplesstudiesonthesuperconductivityofaluminene AT limthongleng firstprinciplesstudiesonthesuperconductivityofaluminene |