Polarization-Driven Charge Frustration and Emergent Phases in the One-Dimensional Extended Hubbard Model
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914155098800128 |
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| author | Saha, Sourabh Brink, Jeroen van den Kumar, Manoranjan Nishimoto, Satoshi |
| author_facet | Saha, Sourabh Brink, Jeroen van den Kumar, Manoranjan Nishimoto, Satoshi |
| contents | Frustration is a key driver of exotic quantum phases, yet its role in charge dynamics remains largely unexplored. We show that charge frustration - induced by electronic polarization effects - stabilizes unconventional insulating states in the one-dimensional extended Hubbard model. Using exact diagonalization and density-matrix renormalization group, we uncover a charge-disordered phase that remains insulating despite lacking long-range order and possessing an effectively attractive on-site interaction - a behavior reminiscent of gapful spin liquids in frustrated spin systems. We also identify a fragile ferroelectric phase and a charge-density-wave state with emergent eight-site periodicity. These findings establish charge frustration, driven by charge-dipole interactions, as a robust mechanism for realizing exotic phases in low-dimensional correlated systems, with implications for organic conductors, transition-metal oxides, and ultracold polar molecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_01725 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polarization-Driven Charge Frustration and Emergent Phases in the One-Dimensional Extended Hubbard Model Saha, Sourabh Brink, Jeroen van den Kumar, Manoranjan Nishimoto, Satoshi Strongly Correlated Electrons Frustration is a key driver of exotic quantum phases, yet its role in charge dynamics remains largely unexplored. We show that charge frustration - induced by electronic polarization effects - stabilizes unconventional insulating states in the one-dimensional extended Hubbard model. Using exact diagonalization and density-matrix renormalization group, we uncover a charge-disordered phase that remains insulating despite lacking long-range order and possessing an effectively attractive on-site interaction - a behavior reminiscent of gapful spin liquids in frustrated spin systems. We also identify a fragile ferroelectric phase and a charge-density-wave state with emergent eight-site periodicity. These findings establish charge frustration, driven by charge-dipole interactions, as a robust mechanism for realizing exotic phases in low-dimensional correlated systems, with implications for organic conductors, transition-metal oxides, and ultracold polar molecules. |
| title | Polarization-Driven Charge Frustration and Emergent Phases in the One-Dimensional Extended Hubbard Model |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.01725 |