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High-temperature phonon-mediated superconductivity in monolayer Mg2B4C2.
- Source :
- NPJ Quantum Materials; 4/1/2022, Vol. 7 Issue 1, p1-8, 8p
- Publication Year :
- 2022
-
Abstract
- A two-dimensional material – Mg<subscript>2</subscript>B<subscript>4</subscript>C<subscript>2</subscript>, belonging to the family of the conventional superconductor MgB<subscript>2</subscript>, is theoretically predicted to exhibit superconductivity with critical temperature T<subscript>c</subscript> estimated in the 47–48 K range (predicted using the McMillian-Allen-Dynes formula) without any tuning of external parameters such as doping, strain, or substrate-induced effects. The origin of such a high intrinsic T<subscript>c</subscript> is ascribed to the presence of strong electron-phonon coupling and large density of states at the Fermi level. This system is obtained after replacing the chemically active boron-boron surface layers in a MgB<subscript>2</subscript> slab by chemically inactive boron-carbon layers. Hence, the surfaces of this material are inert. Our calculations confirm the stability of 2D Mg<subscript>2</subscript>B<subscript>4</subscript>C<subscript>2</subscript>. We also find that the key features of this material remain essentially unchanged when its thickness is increased by modestly increasing the number of inner MgB<subscript>2</subscript> layers. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23974648
- Volume :
- 7
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- NPJ Quantum Materials
- Publication Type :
- Academic Journal
- Accession number :
- 156109557
- Full Text :
- https://doi.org/10.1038/s41535-022-00446-6