816 Chiral Flux phase in Kagome Superconductors

One class of materials that exhibits a large variety of possible ordered states and quantum phenomena are Kagome1 metals. They are known for a long time, but in recent years the interest in these materials and their properties grew again. In 2019 the new compound AV3Sb5 (A K,Rb,Cs) was discovered by Ortiz et al. [2] and Cs3Sb5 was the first of the three found to be superconducting at 2.5 K one year later [3]. The announcement of superconductivity in Rb3Sb5 [4] and KV3Sb5 [5] followed shortly after. Recent discussions show competition of a vector charge density wave (vCDW), a charge bond order (CBO) [6, 7] and a chiral flux phase (CFP) [8]. Using a Hubbard model and a Hamiltonian diagonalization approach, Feng et al. [8] find the CFP to be favorable over the other order types. In this project, we will try to reproduce these findings.