Pair-Density-Wave Superconductivity: A Microscopic Model on the 2D Honeycomb Lattice

被引：0

作者：

Jiang, Yi-Fan ^{[1
]}

Yao, Hong ^{[2
]}

机构：

[1] School of Physical Science and Technology, ShanghaiTech University, Shanghai,201210, China

[2] Institute for Advanced Study, Tsinghua University, Beijing,100084, China

来源：

Physical Review Letters | 2024年 / 133卷 / 17期

关键词：

Pair-density wave (PDW) is a long-sought exotic state with oscillating superconducting order without external magnetic field. So far it has been rare in establishing a 2D microscopic model with PDW long-range order in its ground state. Here; we propose to study PDW superconductivity in a minimal model of spinless fermions (or spin-polarized electrons) on the honeycomb lattice with nearest-neighbor and next-nearest-neighbor interaction V1 and V2; respectively. By performing a state-of-the-art density-matrix renormalization group study of this t-V1-V2 model at finite doping on six-leg and eight-leg honeycomb cylinders; we show that the ground state exhibits PDW ordering (namely quasi-long-range order with a divergent PDW susceptibility). Remarkably this PDW state persists on the wider cylinder with 2D-like Fermi surfaces. To the best of our knowledge; this is probably the first controlled numerical evidence of PDW in systems with 2D-like Fermi surfaces. © 2024 American Physical Society;

D O I：

10.1103/PhysRevLett.133.176501

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引用

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