Interacting-Holstein and extended-Holstein bipolarons
SCIE
SCOPUS
- Title
- Interacting-Holstein and extended-Holstein bipolarons
- Authors
- Chakraborty, M; Tezuka, M; Min, BI
- Date Issued
- 2014-01-30
- Publisher
- APS
- Abstract
- Employing the recently developed self-consistent variational basis generation scheme, we have investigated the bipolaron-bipolaron interaction within the purview of the Holstein-Hubbard and the extended-Holstein-Hubbard (F2H) models on a discrete one-dimensional lattice. The density-matrix renormalization group method has also been used for the Holstein-Hubbard model. We have shown that there exists no bipolaron-bipolaron attraction in the Holstein-Hubbard model. In contrast, we have obtained clear-cut bipolaron-bipolaron attraction in the F2H model. Composite bipolarons are formed above a critical electron-phonon coupling strength, which can survive the finite Hubbard U effect. We have constructed the phase diagram of F2H polarons and bipolarons, and discussed the phase separation in terms of the formation of composite bipolarons.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12324
- DOI
- 10.1103/PHYSREVB.89.035146
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 89, no. 3, page. 35146 - 35146, 2014-01-30
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.