Nonanalytic contributions to the self-energy and the thermodynamics of two-dimensional Fermi liquids.
Nonanalytic contributions to the self-energy and the thermodynamics of two-dimensional Fermi liquids.
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对二维费米液体的自能和热力学的非解析贡献。
DOI：
10.1103/physrevlett.71.1043
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发表时间：
1993
影响因子：
8.6
通讯作者：
Bedell
中科院分区：
文献类型：
--
作者：
Coffey;Bedell
我们用费米子间接触相互作用的模型计算了二维费米液体的熵。我们发现，有[ital T][sup 2]的贡献，熵的相互作用分开，由于集体模式。这些贡献来自对自能的真实的部分的非分析修正，该修正可以通过Kramers-Kronig关系从自能的虚部的超前对数依赖性来计算。我们发现没有证据表明费米液体理论在2D的故障，并得出结论，费米液体在2D是类似的3D费米液体。
We calculate the entropy of a two-dimensional Fermi liquid using a model with a contact interaction between fermions. We find that there are [ital T][sup 2] contributions to the entropy from interactions separate from those due to the collective modes. These [ital T][sup 2] contributions arise fron nonanalytic corrections to the real part of the self-energy which may be calculated from the leading-log dependence of the imaginary part of the self-energy through the Kramers-Kronig relation. We find no evidence of a breakdown in Fermi liquid theory in 2D and conclude that Fermi liquids in 2D are similar to 3D Fermi liquids.