Effects of momentum-dependent self-energy in the electronic structure of correlated materials
(2013) In Physical Review B (Condensed Matter and Materials Physics) 87(11).- Abstract
- 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... (More)
- 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 (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3651276
- author
- Miyake, T. ; Martins, C. ; Sakuma, Rei LU and Aryasetiawan, Ferdi LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 87
- issue
- 11
- article number
- 115110
- publisher
- American Physical Society
- external identifiers
-
- wos:000315732100003
- scopus:84874892901
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.87.115110
- language
- English
- LU publication?
- yes
- id
- 370dd583-181a-4ddd-94bd-efa13db618a6 (old id 3651276)
- date added to LUP
- 2016-04-01 13:19:58
- date last changed
- 2022-03-06 05:15:17
@article{370dd583-181a-4ddd-94bd-efa13db618a6,
abstract = {{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}},
author = {{Miyake, T. and Martins, C. and Sakuma, Rei and Aryasetiawan, Ferdi}},
issn = {{1098-0121}},
language = {{eng}},
number = {{11}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Effects of momentum-dependent self-energy in the electronic structure of correlated materials}},
url = {{http://dx.doi.org/10.1103/PhysRevB.87.115110}},
doi = {{10.1103/PhysRevB.87.115110}},
volume = {{87}},
year = {{2013}},
}