  Thermoelectric coefficients of an ultra-thin topological insulator are
presented here. The hybridization between top and bottom surface states of a
topological insulator plays a significant role. In absence of magnetic field,
thermopower increases and thermal conductivity decreases with increase of the
hybridization energy. In presence of magnetic field perpendicular to the
ultra-thin topological insulator, thermoelectric coefficients exhibit quantum
oscillations with inverse magnetic field, whose frequency is strongly modified
by the Zeeman energy and phase factor is governed by the product of the Lande
g-factor and the hybridization energy. In addition to the numerical results,
the low-temperature approximate analytical results of the thermoelectric
coefficients are also provided. It is also observed that for a given magnetic
field these transport coefficients oscillate with hybridization energy, whose
frequency depends on the Lande g-factor.
