范德瓦尔斯多层膜中由子系统对称性破缺产生的非费米液体
Non-Fermi Liquids from Subsystem Symmetry Breaking in van der Waals Multilayers
AI总结：
本研究揭示范德瓦尔斯多层膜中，层间激子凝聚引发的子系统对称破缺可诱导各向异性非费米液体态，通过理论计算验证了其低温比热的对数增强特性并给出实验方案。
摘要：
我们研究了层间激子凝聚驱动下、二维费米液体金属堆叠结构中的子系统对称性自发破缺，其中每一层都保持子系统粒子数守恒对称性。该破缺对称相中产生的Goldstone模会耦合到垂直于层的准粒子流。这种在小动量转移下仍保持非零的耦合作用，会在层数足够多时催生三维各向异性边缘费米液体态。我们提出该现象可在二维多层范德瓦尔斯异质结中实现实验验证。通过自洽平均场计算，我们表征了子系统对称破缺金属态，并在无规相近似下考察了涨落对其物理性质的影响。我们发现这些涨落会使低温比热出现额外的对数增强，具体形式为$C\sim T (\log(1/T))^2$。
英文摘要：
We investigate the spontaneous breaking of subsystem symmetry in a stack of two-dimensional Fermi liquid metals, each maintaining a subsystem number conservation symmetry, driven by interlayer exciton condensation. The resulting Goldstone modes in this broken symmetry phase couple to the quasiparticle current perpendicular to the layers. This coupling, which remains non-zero for small momentum transfers, leads to the emergence of a three-dimensional anisotropic marginal Fermi liquid state when the number of layers is sufficiently large. We propose a possible experimental realization of this phenomenon in two-dimensional multilayer van der Waals heterostructures. Using self-consistent mean-field calculations, we characterize the subsystem symmetry-broken metallic state and examine the effects of fluctuations on its physical properties within the random phase approximation. We find that these fluctuations produce additional logarithmic enhancements to the specific heat at low temperature, specifically $C\sim T (\log(1/T))^2$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
