期刊
PHYSICAL REVIEW B
卷 87, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.115110
关键词
-
资金
- HPCI Strategic Programs for Innovative Research (SPIRE)
- CMSI
- KAKENHI from MEXT, Japan [22104010]
- Swedish Research Council
- Grants-in-Aid for Scientific Research [22104010] Funding Source: KAKEN
We study how the k dependence in the self-energy affects the quasiparticle band structure and one-particle spectral functions. It is known that, in electron-gas-like materials, the self-energy depends significantly on k and there is a strong cancellation between the k dependence and the energy dependence of the self-energy. Analysis of the GW self-energy reveals that, even in correlated materials with narrow bands, such as SrVO3, the self-energy significantly depends on k. When the nonlocal effect is neglected, the quasiparticle band structure is over-renormalized, yielding too large mass enhancement compared to the case of k-dependent self-energy. The present result suggests that partial cancellation between the frequency dependence and the k dependence in the self-energy is important when discussing the quasiparticle band structure of correlated materials. DOI: 10.1103/PhysRevB.87.115110
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据