上海科技大学

摘要：

We revisit the challenging problem of identifying the spin liquid candidate of the spin-1/2 J1-J2 Heisenberg antiferromagnet on the square lattice. By integrating the Gutzwiller-projected density matrix renormalization group method with analytical analyses, we present clear evidence that the ground state is a Z2 Dirac spin liquid. This state can be effectively described by a parton ansatz, characterized by its projective symmetry group. Additionally, we investigate the potential chiral spin liquid ground states by incorporating a Jχ term into the J1-J2 model and observe a transition from a Z2 chiral spin liquid to a U(1) one.

报告人简介：

金汇可先后于2015年和2020年在浙江大学获得理学学士和博士学位。2020年至 2024年，在德国慕尼黑工业大学从事博士后研究工作。2024年9月加入上海科技大学物质学院担任助理教授。主要从事强关联电子和非平衡物理的理论研究 ，以及开发新的方法。