  Magic-angle twisted bilayer graphene (MtBLG) has proven to be an extremely
promising new platform to realize and study a host of emergent quantum phases
arising from the strong correlations in its narrow bandwidth flat band. In this
regard, thermal transport phenomena like thermopower, in addition to being
coveted technologically, is also sensitive to the particle-hole (PH) asymmetry,
making it a crucial tool to probe the underlying electronic structure of this
material. We have carried out thermopower measurements of MtBLG as a function
of carrier density, temperature and magnetic field, and report the observation
of an unusually large thermopower reaching up to a value as high as $\sim
\bf{100\mu V/K}$ at a low temperature of 1K. Surprisingly, our observed
thermopower exhibiting peak-like features in close correspondence to the
resistance peaks around the integer Moire fillings, including the Dirac Point,
violating the Mott formula. %Surprisingly, our observed thermopower exhibits
peak-like features in close correspondence to the resistance peaks around the
integer Moire fillings, including the Dirac Point, which completely violates
the Mott formula. We show that the large thermopower peaks and their
%non-monotonic dependence with temperature and magnetic field associated
behaviour arise from the emergent highly PH asymmetric electronic structure due
to the cascade of Dirac revivals. Furthermore, the thermopower shows an
anomalous peak around the superconducting transition on the hole side and
points towards the possible role of enhanced superconducting fluctuations in
MtBLG.
