Structural, electronic, elastic and vibrational properties of two dimensional graphene-like BN under high pressure
   
Yazarlar (2)
Prof. Dr. Cihan KÜRKÇÜ Kırşehir Ahi Evran Üniversitesi, Türkiye
Çağatay Yamçıçıer Gazi Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Solid State Communications (Q3)
Dergi ISSN 0038-1098 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 12-2019
Cilt / Sayı / Sayfa 303 / 1 / 113740–0 DOI 10.1016/j.ssc.2019.113740
Makale Linki https://linkinghub.elsevier.com/retrieve/pii/S0038109819306039
Özet
The structural, electronic, elastic and vibrational properties of boron nitride (BN) were analyzed using ab initio computational methods based on density functional theory. The exchange-correlation energy functional was evaluated using the local density approximation (LDA) under pressure. BN crystallizes in hexagonal structure (h-BN) with symmetry P 6 3/mmc. The structural transform was obtained at the BN from h-BN transformed into wurtzite (w-BN) with symmetry P 6 3 mc at 12.5 GPa. During this phase transformation, intermediate states with space group P 3¯ m 1 and P3m1were observed. Besides, the electronic properties for the obtained stable phases of BN were calculated. Both structures have a semiconductor character with a direct band gap. We also made elastic and phonon calculations to understand the mechanical and dynamically stability of the obtained phases of BN. BN is stable in both phases. As …
Anahtar Kelimeler
2d materials | Elastic constants | Electronic structure | Intermediate state | Phase transition | Phonon