Speaker: Cheng Peng, Stanford
Program Description:
Quantum spin liquids (QSLs) are highly entangled phases of matter that exhibit various novel features associated with their topological character, resisting symmetry breaking even at zero temperature due to strong quantum fluctuations and geometric frustrations. Promising evidence of QSLs has been revealed in 2D quantum materials. As the parent state, doped quantum spin liquids may give exotic quantum states, such as superconducting and pair-density waves. This talk will present the recent density-matrix renormalization group study of doping several QSLs on two-dimensional systems. We found a precursor of pair-density wave after doping the Kitaev spin liquid on the honeycomb lattice. Doping gapless spin liquid on the triangular lattice also exhibits a PDW signature that only appears at relatively long distances. Doping the QSLs on the kagome lattice suggests an insulating phase with long-range CDW orders, but second-neighbor interactions can enhance the superconducting correlation.
