2018
DOI: 10.1016/j.rinp.2018.07.042
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Theoretical study of CaO, CaS and CaSe via first-principles calculations

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Cited by 35 publications
(7 citation statements)
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“…The optimised structural parameters are determined by fitting the variations of energies as a function of equilibrium volumes using the empirical Murnaghan equation of state [35]. The computed structural properties such as the lattice constants (a), bulk modules (B) and their pressure derivatives (B') of CaO and Ca 1−x Ti x O at concentrations x = 0.125, 0.25, 0.5 and 0.75 with other theoretical [36][37][38][39] and experimental [40] results are given in Table 1. The lattice constant and the bulk modulus of CaO are close to theoretical values [36] of GGA-WC [30] and appeared to be consistent with the experimental ones [40].…”
Section: Structural Propertiesmentioning
confidence: 99%
“…The optimised structural parameters are determined by fitting the variations of energies as a function of equilibrium volumes using the empirical Murnaghan equation of state [35]. The computed structural properties such as the lattice constants (a), bulk modules (B) and their pressure derivatives (B') of CaO and Ca 1−x Ti x O at concentrations x = 0.125, 0.25, 0.5 and 0.75 with other theoretical [36][37][38][39] and experimental [40] results are given in Table 1. The lattice constant and the bulk modulus of CaO are close to theoretical values [36] of GGA-WC [30] and appeared to be consistent with the experimental ones [40].…”
Section: Structural Propertiesmentioning
confidence: 99%
“…Among them, CaM is the most widely used ranging from catalysis to microelectronics. A lot of studies using different ab initio methods have been performed on structural phase transitions, metallization, cohesive and elastic properties at ambient conditions and under high pressure on CaM [23][24][25][26][27][28]. However, the research of phonon transport in CaM is relatively rare.…”
Section: Introductionmentioning
confidence: 99%
“…The variations of total energies as a function of volumes of Ca 1-x Cr x O compounds are fitted by Murnaghan (1944) equation of state to determine the equilibrium structural parameters. Table 1 summarizes the lattice constants, the bulk modules, and their first derivatives with other experimental data (Mammone et al, 1981;Kaneko et al, 1982;Richet et al, 1988) and theoretical values (Tran et al, 2007;Wu et al, 2014;Cinthia et al, Fan et al, 2015;Nejatipour and Dadsetani, 2015;Santana et al, 2016;Yang et al, 2016;Salam, 2018) computed by the generalized gradient approximation of Perdew-Burke-Ernzerhof (GGA-PBE) (Perdew et al, 1996), revised GGA of Perdew-Burke-Ernzerhof (GGA-PBEsol) (Perdew et al, 2008) and the local density approximation (LDA) (Perdew and Zunger, 1981;Perdew and Wang, 1992).…”
Section: Equilibrium Structural Parametersmentioning
confidence: 99%
“…Table 2 shows the computed band gaps such as the direct HMF gaps (Fan et al, 2015;Nejatipour and Dadsetani, 2015;Yang et al, 2016;Tran and Blaha, 2017;Salam, 2018) and experimental data (Whited et al, 1973). The result of wideindirect gap of 5.392 eV of CaO is in good agreement with recent calculated value of 5.35 eV of Tran and Blaha (2017) study using the same TB-mBJ potential (Becke and Johnson, 2006;Tran and Blaha, 2009), and it is better than the values ranging from 3.437 to 3.67 eV of Fan et al (2015), Nejatipour and Dadsetani (2015), Yang et al (2016), Tran and Blaha (2017), Salam (2018) found by the LDA (Perdew and Zunger, 1981;Perdew and Wang, 1992), GGA-WC (Wu and Cohen, 2006), GGA-PBE (Perdew et al, 1996), and GGA-PBEsol exchange potentials (Perdew et al, 2008). The TB-mBJ provides accurate gap for CaO because he is known for its performance in the calculation of electronic structures of insulators and semiconductors with respect to LDA and all forms of GGA approximations (Bhattacharjee and Chattopadhyaya, 2017a,b; Chattopadhyaya and Bhattacharjee, 2017;Berriah et al, 2018).…”
Section: Electronic Propertiesmentioning
confidence: 99%