论文标题
掺杂的莫特绝缘子从二极化金属到费米液体的微观演化
Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid
论文作者
论文摘要
二维Mott绝缘子中的抗铁磁性和孔运动之间的竞争是依赖于异常金属到常规费米液体的兴奋剂依赖性过渡的核心。凝结物质实验表明，在这种交叉中，载体载体改变了其性质，但完全理解仍然难以捉摸。我们在冷原子量子模拟器上观察到在费米 - 哈伯德系统中的这种交叉，并揭示了在大量旋转能量周围的温度上增加掺杂后，旋转和孔之间的多点相关性的转变。从系统的微观快照中计算出常规的可观察物，例如自旋敏感性。从磁性极化子制度开始，我们发现该系统演变成具有不稳定的磁波动并从根本上改变相关性的费米液体。孔掺杂量约为$ 30 \％$。我们的工作基准了理论方法，并讨论了与降低温度现象的可能联系。
The competition between antiferromagnetism and hole motion in two-dimensional Mott insulators lies at the heart of a doping-dependent transition from an anomalous metal to a conventional Fermi liquid. Condensed matter experiments suggest charge carriers change their nature within this crossover, but a complete understanding remains elusive. We observe such a crossover in Fermi-Hubbard systems on a cold-atom quantum simulator and reveal the transformation of multi-point correlations between spins and holes upon increasing doping at temperatures around the superexchange energy. Conventional observables, such as spin susceptibility, are furthermore computed from the microscopic snapshots of the system. Starting from a magnetic polaron regime, we find the system evolves into a Fermi liquid featuring incommensurate magnetic fluctuations and fundamentally altered correlations. The crossover is completed for hole dopings around $30\%$. Our work benchmarks theoretical approaches and discusses possible connections to lower temperature phenomena.
