"315160" . "Khenata, R." . . "6"^^ . . "GENERALIZED GRADIENT APPROXIMATION; CRYSTAL-STRUCTURES; BAND-STRUCTURE; ALLOYS; SUSCEPTIBILITIES; SEMICONDUCTORS; SOLIDS; GROWTH"@en . . . "000272466700003" . . . "Ouahrani, T." . "We report results from first-principles density functional calculations using the full-potential linear augmented plane wave (FP-LAPW) method. The generalized gradient approximation (GGA) and the Engel-Vosko-generalized gradient approximation (EV-GGA) were used for the exchange-correlation energy of the structural, electronic, linear and nonlinear optical properties of the chalcopyrite Ga2PSb compound. The valence band maximum (VBM) is located at the I%22(v) point, and the conduction band minimum (CBM) is located at the I%22(c) point, resulting in a direct band gap of about 0.365 eV for GGA and 0.83 eV for EV-GGA. In comparison with the experimental one (1.2 eV) we found that EV-GGA calculation gives energy gap in reasonable agreement with the experiment. The spin orbit coupling has marginal influence on the optical properties. The ground state quantities such as lattice parameters (a, c and u), bulk modules B and its pressure derivative B(')are evaluated."@en . "First-principles study of structural, electronic, linear and nonlinear optical properties of Ga2PSb ternary chalcopyrite" . "RIV/60076658:12640/09:00010000" . "1"^^ . "Otero de la Roza, A." . "First-principles study of structural, electronic, linear and nonlinear optical properties of Ga2PSb ternary chalcopyrite" . "We report results from first-principles density functional calculations using the full-potential linear augmented plane wave (FP-LAPW) method. The generalized gradient approximation (GGA) and the Engel-Vosko-generalized gradient approximation (EV-GGA) were used for the exchange-correlation energy of the structural, electronic, linear and nonlinear optical properties of the chalcopyrite Ga2PSb compound. The valence band maximum (VBM) is located at the I%22(v) point, and the conduction band minimum (CBM) is located at the I%22(c) point, resulting in a direct band gap of about 0.365 eV for GGA and 0.83 eV for EV-GGA. In comparison with the experimental one (1.2 eV) we found that EV-GGA calculation gives energy gap in reasonable agreement with the experiment. The spin orbit coupling has marginal influence on the optical properties. The ground state quantities such as lattice parameters (a, c and u), bulk modules B and its pressure derivative B(')are evaluated." . "3" . . "[250FA2CED08E]" . "Mebrouki, M." . . "Reshak, Ali Hussain" . "7"^^ . "First-principles study of structural, electronic, linear and nonlinear optical properties of Ga2PSb ternary chalcopyrite"@en . "1434-6028" . "RIV/60076658:12640/09:00010000!RIV10-MSM-12640___" . "Luana, V." . . . "V" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Amrani, B." . . "72" . . . "First-principles study of structural, electronic, linear and nonlinear optical properties of Ga2PSb ternary chalcopyrite"@en . . . "Reshak, Ali Hussain" . "12640" . . . "European Physical Journal B" .