Citation

Yeoh, Keat Hoe and Yoon, Tiem Leong and Rusi, 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

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Abstract

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, of 6.5 K. The 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.

Item Type:	Article
Uncontrolled Keywords:	Superconductivity, First-principles calculation
Subjects:	Q Science > QC Physics > QC501-766 Electricity and magnetism > QC501-(721) Electricity
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	10 Nov 2020 14:17
Last Modified:	10 Nov 2020 14:17
URII:	http://shdl.mmu.edu.my/id/eprint/7292

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