Spectral properties of 1D extended Hubbard model from bosonization and time-dependent variational principle: applications to 1D cuprate
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
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2022
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| _version_ | 1866914644214415360 |
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| author | Wang, Hao-Xin Wu, Yi-Ming Jiang, Yi-Fan Yao, Hong |
| author_facet | Wang, Hao-Xin Wu, Yi-Ming Jiang, Yi-Fan Yao, Hong |
| contents | Recent ARPES experiments on doped 1D cuprates revealed the importance of effective near-neighbor (NN) attractions in explaining certain features in spectral functions. Here we investigate spectral properties of the extended Hubbard model with the on-site repulsion $U$ and NN interaction $V$, by employing bosonization analysis and the high-precision time-dependent variational principle (TDVP) calculations of the model on 1D chain with up to 300 sites. From state-of-the-art TDVP calculations, we find that the spectral weights of the holon-folding and $3k_F$ branches evolve oppositely as a function of $V$. This peculiar dichotomy may be explained in bosonization analysis from the opposite dependence of exponent that determines the spectral weights on Luttinger parameter $K_ρ$. Moreover, our TDVP calculations of models with fixed $U=8t$ and different $V$ show that $V\approx -1.7t$ may fit the experimental results best, indicating a moderate effective NN attraction in 1D cuprates that might provide some hints towards understanding superconductivity in 2D cuprates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_02031 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Spectral properties of 1D extended Hubbard model from bosonization and time-dependent variational principle: applications to 1D cuprate Wang, Hao-Xin Wu, Yi-Ming Jiang, Yi-Fan Yao, Hong Strongly Correlated Electrons Superconductivity Recent ARPES experiments on doped 1D cuprates revealed the importance of effective near-neighbor (NN) attractions in explaining certain features in spectral functions. Here we investigate spectral properties of the extended Hubbard model with the on-site repulsion $U$ and NN interaction $V$, by employing bosonization analysis and the high-precision time-dependent variational principle (TDVP) calculations of the model on 1D chain with up to 300 sites. From state-of-the-art TDVP calculations, we find that the spectral weights of the holon-folding and $3k_F$ branches evolve oppositely as a function of $V$. This peculiar dichotomy may be explained in bosonization analysis from the opposite dependence of exponent that determines the spectral weights on Luttinger parameter $K_ρ$. Moreover, our TDVP calculations of models with fixed $U=8t$ and different $V$ show that $V\approx -1.7t$ may fit the experimental results best, indicating a moderate effective NN attraction in 1D cuprates that might provide some hints towards understanding superconductivity in 2D cuprates. |
| title | Spectral properties of 1D extended Hubbard model from bosonization and time-dependent variational principle: applications to 1D cuprate |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2211.02031 |