Pengling spent more than two years investigating the magnetic excitations in the quantum spin liquid candidate NaYbSe2 with perfect triangular lattice of Yb3+. She found that the ground state could be a quantum spin liquid state with a spinon Fermi surface. The paper has recently been published in Phys. Rev. X. See: https://doi.org/10.1103/PhysRevX.11.021044