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• W2090203669 abstract "The accuracy of different total-energy methods to compute the properties of multicomponent oxides is studied. These materials have typically large unit cells and consequently, computer-running time considerations become important. We show that while highly sophisticated quantum-mechanics techniques such as pseudopotentials or the full-potential linearized-augmented-plane-wave method can be used to accurately compute materials properties, they may require prohibitively long computer runs in oxides. On the other hand, simple potential models, or even fast quantum-mechanics methods such as the spherical self-consistent atomic deformation or the linear muffin-tin orbital method (in the atomic sphere approximation), are not always reliable to study oxides. Charge transfer, breathing of the oxygen ions, and nonspherical charge relaxations are some of the factors that can make any of these schemes fail. However, it is not necessary to always use sophisticated techniques. We show that the self-consistent tight-binding formalism can be used as an interpolation tool to extend the results of accurate calculations for a few compounds in a system to the rest of them. This opens new possibilities for the use of ab initio methods to study technologically-relevant materials properties, such as the temperature behavior of oxides, since formation energies of many different compounds at 0 K are a crucial input to these models." @default.
• W2090203669 created "2016-06-24" @default.
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• W2090203669 date "1997-05-01" @default.
• W2090203669 modified "2023-09-24" @default.
• W2090203669 title "Calculation of total energies in multicomponent oxides" @default.
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• W2090203669 doi "https://doi.org/10.1016/s0927-0256(97)00027-x" @default.
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