Pseudogap phase as fluctuating pair density wave
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911877311758336 |
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| author | Yue, Zheng-Yuan Xu, Zheng-Tao Yang, Shuo Gu, Zheng-Cheng |
| author_facet | Yue, Zheng-Yuan Xu, Zheng-Tao Yang, Shuo Gu, Zheng-Cheng |
| contents | The physical nature of pseudogap phase is one of the most important and intriguing problems towards understanding the key mechanism of high temperature superconductivity in cuprates. Theoretically, the square-lattice $t$-$J$ model is widely believed to be the simplest toy model that captures the essential physics of cuprate superconductors. We employ the Grassmann tensor product state approach to investigate uniform states in the underdoped ($δ\lesssim 0.1$) region. In addition to the previously known uniform $d$-wave state, we discover a strongly fluctuating pair density wave (PDW) state with wave vector $Q = (π, π)$. This fluctuating PDW state weakly breaks the $C_4$ rotational symmetry of the square lattice and has a lower or comparable energy to the $d$-wave state (depending on doping and the $t/J$ ratio), making it a promising candidate state for describing the pseudogap phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_16770 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pseudogap phase as fluctuating pair density wave Yue, Zheng-Yuan Xu, Zheng-Tao Yang, Shuo Gu, Zheng-Cheng Strongly Correlated Electrons The physical nature of pseudogap phase is one of the most important and intriguing problems towards understanding the key mechanism of high temperature superconductivity in cuprates. Theoretically, the square-lattice $t$-$J$ model is widely believed to be the simplest toy model that captures the essential physics of cuprate superconductors. We employ the Grassmann tensor product state approach to investigate uniform states in the underdoped ($δ\lesssim 0.1$) region. In addition to the previously known uniform $d$-wave state, we discover a strongly fluctuating pair density wave (PDW) state with wave vector $Q = (π, π)$. This fluctuating PDW state weakly breaks the $C_4$ rotational symmetry of the square lattice and has a lower or comparable energy to the $d$-wave state (depending on doping and the $t/J$ ratio), making it a promising candidate state for describing the pseudogap phase. |
| title | Pseudogap phase as fluctuating pair density wave |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2404.16770 |