Observation of emergent scaling of spin-charge correlations at the onset of the pseudogap
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912855120412672 |
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| author | Chalopin, Thomas Bojović, Petar Wang, Si Franz, Titus Sinha, Aritra Wang, Zhenjiu Bourgund, Dominik Obermeyer, Johannes Grusdt, Fabian Bohrdt, Annabelle Pollet, Lode Wietek, Alexander Georges, Antoine Hilker, Timon Bloch, Immanuel |
| author_facet | Chalopin, Thomas Bojović, Petar Wang, Si Franz, Titus Sinha, Aritra Wang, Zhenjiu Bourgund, Dominik Obermeyer, Johannes Grusdt, Fabian Bohrdt, Annabelle Pollet, Lode Wietek, Alexander Georges, Antoine Hilker, Timon Bloch, Immanuel |
| contents | In strongly correlated materials, interacting electrons are entangled and form collective quantum states, resulting in rich low-temperature phase diagrams. Notable examples include cuprate superconductors, in which superconductivity emerges at low doping out of an unusual "pseudogap" metallic state above the critical temperature. The Fermi-Hubbard model, describing a wide range of phenomena associated with strong electron correlations, still offers major computational challenges despite its simple formulation. In this context, ultracold atoms quantum simulators have provided invaluable insights into the microscopic nature of correlated quantum states. Here, we use a quantum gas microscope Fermi-Hubbard simulator to explore a wide range of dopings and temperatures in a regime where a pseudogap is known to develop. By measuring multi-point correlation functions up to fifth order, we uncover a novel universal scaling behaviour in magnetic and higher-order spin-charge correlations characterised by a doping-dependent temperature scale. Accurate comparisons with determinant Quantum Monte Carlo and Minimally Entangled Typical Thermal States simulations confirm that this temperature scale is comparable to the pseudogap temperature T*. Our quantitative findings reveal a novel qualitative behaviour of magnetic properties and spin-charge correlations in an emergent pseudogap and pave the way towards the exploration of charge pairing and collective phenomena expected at lower temperatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_17801 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observation of emergent scaling of spin-charge correlations at the onset of the pseudogap Chalopin, Thomas Bojović, Petar Wang, Si Franz, Titus Sinha, Aritra Wang, Zhenjiu Bourgund, Dominik Obermeyer, Johannes Grusdt, Fabian Bohrdt, Annabelle Pollet, Lode Wietek, Alexander Georges, Antoine Hilker, Timon Bloch, Immanuel Strongly Correlated Electrons Quantum Gases Quantum Physics In strongly correlated materials, interacting electrons are entangled and form collective quantum states, resulting in rich low-temperature phase diagrams. Notable examples include cuprate superconductors, in which superconductivity emerges at low doping out of an unusual "pseudogap" metallic state above the critical temperature. The Fermi-Hubbard model, describing a wide range of phenomena associated with strong electron correlations, still offers major computational challenges despite its simple formulation. In this context, ultracold atoms quantum simulators have provided invaluable insights into the microscopic nature of correlated quantum states. Here, we use a quantum gas microscope Fermi-Hubbard simulator to explore a wide range of dopings and temperatures in a regime where a pseudogap is known to develop. By measuring multi-point correlation functions up to fifth order, we uncover a novel universal scaling behaviour in magnetic and higher-order spin-charge correlations characterised by a doping-dependent temperature scale. Accurate comparisons with determinant Quantum Monte Carlo and Minimally Entangled Typical Thermal States simulations confirm that this temperature scale is comparable to the pseudogap temperature T*. Our quantitative findings reveal a novel qualitative behaviour of magnetic properties and spin-charge correlations in an emergent pseudogap and pave the way towards the exploration of charge pairing and collective phenomena expected at lower temperatures. |
| title | Observation of emergent scaling of spin-charge correlations at the onset of the pseudogap |
| topic | Strongly Correlated Electrons Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2412.17801 |