Fermi surface of the Kagome materials ATi3Bi5 (A=Cs,Bi)

We report quantum oscillation measurements on the kagome compounds ATi3Bi5 (A=Rb, Cs) in magnetic fields up to 41.5 T and temperatures down to 550 mK. We have performed Lifshitz Kosevich fittings to extract the effective masses and have measured the observed peak frequency as a function of angle to get information about the dimensionality of the fermi surface. In addition to the frequencies observed in previous studies, we have observed multiple unreported frequencies above 2000 T using a tunnel diode oscillator technique. We compare these results against DFT calculations and find good agreement with the DFT in the number of peaks observed, frequency, and the dimensionality of the Fermi surface.