Emergent Pair Density Wave Order Across a Lifshitz Transition
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908990381752320 |
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| author | Yang, Luhang Dagotto, Elbio Feiguin, Adrian E. |
| author_facet | Yang, Luhang Dagotto, Elbio Feiguin, Adrian E. |
| contents | We numerically investigate the telltale signs of pair-density-wave order (PDW) in the Kondo-Heisenberg chain by focusing on the momentum resolved spectrum in different parameter regimes. Density matrix renormalization group calculations reveal that this phase is characterized by a dispersion with two minima and four Fermi points, indicating the emergence of an effective next-nearest-neighbor hopping that arises as a second-order effect to avoid magnetic frustration. The pairs appear in the spectrum as in-gap bound states with weight concentrated in the hole pockets. The low-energy physics can be understood by means of a generalized t-J model with next-nearest-neighbor hopping. Our results offer a guide for searching for experimental signatures, and for other models that can realize PDW physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_19761 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Emergent Pair Density Wave Order Across a Lifshitz Transition Yang, Luhang Dagotto, Elbio Feiguin, Adrian E. Strongly Correlated Electrons Superconductivity We numerically investigate the telltale signs of pair-density-wave order (PDW) in the Kondo-Heisenberg chain by focusing on the momentum resolved spectrum in different parameter regimes. Density matrix renormalization group calculations reveal that this phase is characterized by a dispersion with two minima and four Fermi points, indicating the emergence of an effective next-nearest-neighbor hopping that arises as a second-order effect to avoid magnetic frustration. The pairs appear in the spectrum as in-gap bound states with weight concentrated in the hole pockets. The low-energy physics can be understood by means of a generalized t-J model with next-nearest-neighbor hopping. Our results offer a guide for searching for experimental signatures, and for other models that can realize PDW physics. |
| title | Emergent Pair Density Wave Order Across a Lifshitz Transition |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2503.19761 |