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Beyond ideal two-dimensional metals : Edges, vacancies, and polarizabilities (2018)

Nevalaita, J., & Koskinen, P. (2018). Beyond ideal two-dimensional metals : Edges, vacancies, and polarizabilities. Physical Review B, 98(11), Article 115433. https://doi.org/10.1103/physrevb.98.115433

JYU-tekijät tai -toimittajat

Nevalaita, Janne
Koskinen, Pekka

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Nevalaita, Janne; Koskinen, Pekka

Lehti tai sarja: Physical Review B

ISSN: 2469-9950

eISSN: 2469-9969

Julkaisuvuosi: 2018

Volyymi: 98

Lehden numero: 11

Artikkelinumero: 115433

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/physrevb.98.115433

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/59658

Tiivistelmä

Recent experimental discoveries of graphene-stabilized patches of two-dimensional (2D) metals have motivated also their computational studies. However, so far the studies have been restricted to ideal and infinite 2D metallic monolayers, which is insufficient because in reality the properties of such metallic patches are governed by microstructures pervaded by edges, defects, and several types of perturbations. Here we use density-functional theory to calculate edge and vacancy formation energies of hexagonal and square lattices of 45 elemental 2D metals. We find that the edge and vacancy formation energies are strongly correlated and decrease with increasing Wigner-Seitz radii, analogously to surface energies. Despite a radical reduction in atomic coordination numbers, the 2D and three-dimensional (3D) vacancy formation energies and work functions are nearly the same for each metal. Finally, static polarizabilities reveal a clear cubic dependence on bond length. These trends provide useful insights when moving towards reality with elemental 2D metals.

YSO-asiasanat: nanorakenteet; viat

Vapaat asiasanat: polarisaatio

Tieteenalat: