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gavinliu7390(½ð±Ò+2):лл½»Á÷£¡ 2010-04-26 10:58
gavinliu7390(½ð±Ò+2):лл½»Á÷£¡ 2010-04-26 10:58
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The GW method Calculations of ground-state and excited-state properties of materials have been one of the major goals of condensed matter physics. Ground-state properties of solids have been extensively investigated for several decades within the standard density functional theory. Excited-state properties, on the other hand, were relatively unexplored in ab initio calculations until a decade ago. The most suitable approach up to now for studying excited- state properties of extended systems is the Green function method. To calculate the Green function one requires the self-energy operator which is non-local and energy dependent. In this article we describe the GW approximation which has turned out to be a fruitful approximation to the self-energy. The Green function theory, numerical methods for carrying out the self-energy calculations, simplified schemes, and applications to various systems are described. Self-consistency issue and new developments beyond the GW approximation are also discussed as well as the success and shortcomings of the GW approximation. |
9Â¥2010-04-26 10:58:20
lipeifang82
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gavinliu7390(½ð±Ò+1):лл²ÎÓ룡 2010-05-01 14:40
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gavinliu7390(½ð±Ò+1):лл²ÎÓ룡 2010-05-01 14:40
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2Â¥2010-04-26 08:55:06
qiwei505
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3Â¥2010-04-26 09:19:53
lipeifang82
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