论文标题
伯特晶格上的量子库仑玻璃
Quantum Coulomb glass on the Bethe lattice
论文作者
论文摘要
我们研究了在伯特晶格上无旋式费米子模型中，从强相互作用和混乱的相互作用中出现的库仑玻璃。在无限的配位数限制中，强相互作用诱导金属库仑玻璃相，在费米能量处具有伪制成结构。量子和热波动均融化该玻璃并诱导无序的量子液相。我们将自洽的示意力扰动理论与连续的时间量子蒙特卡洛模拟相结合，以获得电子玻璃的完整相图，并在量子液体中以及在复制对称对称性中表征其动力学特性。隧道光谱在降低温度时显示出EFROS-SHKLOVSKII pSEUDOGAP，但由于残留的量子波动，状态的密度在费米能量下仍然有限。我们的结果与在SI反转层中观察到的金属玻璃相相关。
We study the Coulomb glass emerging from the interplay of strong interactions and disorder in a model of spinless fermions on the Bethe lattice. In the infinite coordination number limit, strong interactions induce a metallic Coulomb glass phase with a pseudogap structure at the Fermi energy. Quantum and thermal fluctuations both melt this glass and induce a disordered quantum liquid phase. We combine self-consistent diagrammatic perturbation theory with continuous time quantum Monte-Carlo simulations to obtain the complete phase diagram of the electron glass, and to characterize its dynamical properties in the quantum liquid, as well as in the replica symmetry broken glassy phase. Tunneling spectra display an Efros-Shklovskii pseudogap upon decreasing temperatures, but the density of states remains finite at the Fermi energy due to residual quantum fluctuations. Our results bear relevance to the metallic glass phase observed in Si inversion layers.
