Monolayer diboron dinitride: Direct band-gap semiconductor with high absorption in the visible range
Yükleniyor...
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
AMER PHYSICAL SOC
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We predict a two-dimensional monolayer polymorph of boron nitride in an orthorhombic structure (o-B2N2) using first-principles calculations. Structural optimization, phonon dispersion, and molecular dynamics calculations show that o-B2N2 is thermally and dynamically stable. o-B2N2 is a semiconductor with a direct band gap of 1.70 eV according to calculations based on hybrid functionals. The structure has high optical absorption in the visible range in the armchair direction while low absorption in the zigzag direction. This anisotropy is also present in electronic and mechanical properties. The in-plane stiffness of o-B2N2 is very close to that of hexagonal boron nitride. The diatomic building blocks of this structure hint at its possible synthesis from precursors having B-B and N-N bonds.
Açıklama
Jahangirov, Seymur/0000-0002-0548-4820; Demirci, Salih/0000-0002-1272-9603; Ershad Rad, Soheil/0000-0001-8947-9625
Anahtar Kelimeler
Kaynak
PHYSICAL REVIEW B
WoS Q DeÄŸeri
Q2
Scopus Q DeÄŸeri
Cilt
101
Sayı
12
Künye
closedAccess
