Polarization-Driven Charge Frustration and Emergent Phases in the One-Dimensional Extended Hubbard Model
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Contributors
Abstract
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.
Details
| Original language | English |
|---|---|
| Article number | 206504 |
| Journal | Physical review letters |
| Volume | 135 |
| Issue number | 20 |
| Publication status | Published - 14 Nov 2025 |
| Peer-reviewed | Yes |