Journal article
Critical behavior of the extended Hubbard model with bond dimerization
- Abstract:
- Exploiting the matrix-product-state based density-matrix renormalization group (DMRG) technique we study the one-dimensional extended (U-V) Hubbard model with explicit bond dimerization in the half-filled band sector. In particular we investigate the nature of the quantum phase transition, taking place with growing ratio V/U between the symmetry-protected-topological and charge-density-wave insulating states. The (weak-coupling) critical line of continuous Ising transitions with central charge c=1/2 terminates at a tricritical point belonging to the universality class of the dilute Ising model with c=7/10. We demonstrate that our DMRG data perfectly match with (tricritical) Ising exponents, e.g., for the order parameter β=1/8 (1/24) and correlation length ν=1 (5/9). Beyond the tricritical Ising point, in the strong-coupling regime, the quantum phase transition becomes first order.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 783.9KB, Terms of use)
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- Publisher copy:
- 10.1016/j.physb.2017.09.001
Authors
- Publisher:
- Elsevier
- Journal:
- Physica B: Condensed Matter More from this journal
- Volume:
- 536
- Pages:
- 474-478
- Publication date:
- 2017-09-06
- Acceptance date:
- 2017-09-01
- DOI:
- EISSN:
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1873-2135
- ISSN:
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0921-4526
- Keywords:
- Pubs id:
-
pubs:731821
- UUID:
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uuid:120a2c9c-d1e4-42ec-b253-06ff1c894a3e
- Local pid:
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pubs:731821
- Source identifiers:
-
731821
- Deposit date:
-
2018-04-19
Terms of use
- Copyright holder:
- Elsevier BV
- Copyright date:
- 2017
- Notes:
- © 2017 Elsevier B.V. All rights reserved. This is the accepted manuscript version of the article. The final version is available online from Elsevier at: https://doi.org/10.1016/j.physb.2017.09.001
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