  Quantum Griffiths singularity is characterized by the divergence of the
dynamical critical exponent with the activated scaling law and has been widely
observed in various two-dimensional superconductors. Recently, the direct
activated scaling analysis with the irrelevant correction has been proposed and
successfully used to analyze the experimental data of crystalline PdTe2 and
polycrystalline \b{eta}-W films, which provides new evidence of quantum
Griffiths singularity. Here we show that the direct activated scaling analysis
is applicable to the experimental data in different superconducting films,
including tri-layer Ga films and LaAlO3/SrTiO3 interface superconductor. When
taking the irrelevant correction into account, we calculate the corrected sheet
resistance at ultralow temperatures. The scaling behavior of the corrected
resistance in a comparably large temperature regime and the theoretical fitting
of the phase boundary give unambiguous evidence of quantum Griffiths
singularity. Compared to the previous method based on the finite size scaling,
the direct activated scaling analysis represents a more direct and precise way
to analyze the experimental data of quantum Griffiths singularity in diverse
two-dimensional superconductors.
