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More accurate generalized gradient approximation for solids
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DOI：10.1103/PhysRevB.73.235116.png)
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摘要
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We present a nonempirical density functional generalized gradient approximation (GGA) that gives significant improvements for lattice constants, crystal structures, and metal surface energies over the most popular Perdew-Burke-Ernzerhof (PBE) GGA. The functional is based on a diffuse radial cutoff for the exchange hole in real space, and the analytic gradient expansion of the exchange energy for small gradients. There are no adjustable parameters, the constraining conditions of PBE are maintained, and the functional is easily implemented in existing codes.
Keyword:
PHASE-TRANSITIONS
EXCHANGE ENERGY
PRINCIPLES
BATIO3
PBTIO3
FERROELECTRICITY
ORIGIN
KNBO3
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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