  We investigate the linear thermoelectric response of an interacting quantum
dot side-coupled by one of two Majorana fermions (MFs) formed at the ends of a
topological superconducting wire. We employ the numerical renormalization group
technique to obtain the thermoelectrical conductance $L$ as well as the
electrical conductance $G$ when the background temperature $T$ and the dot gate
are tuned. We distinguish two transport regimes in which $L$ displays different
features: the weak- $(\Gamma_{m} < T_{K})$ and strong-coupling $(\Gamma_{m} >
T_{K})$ regimes, where $\Gamma_{m}$ and $T_{K}$ are the Majorana-dot coupling
and the Kondo temperature, respectively. For an ideal (infinitely long)
nanowire where the Majorana end states do not overlap $(\epsilon_{m} = 0)$, the
thermoelectrical conductance $L$ in the weak-coupling regime exhibits a peak at
$T \sim \Gamma_{m}$. This peak is ascribed to the anti-Fano resonance between
the asymmetric Kondo resonance and the zero-energy MF mode. Interestingly, in
the strong-coupling regime, the Kondo-induced peak in $L$ is shifted due to the
MF-induced Zeeman splitting in the dot. For finite but small $\epsilon_{m} >
0$, the interference between two MFs restores the Kondo effect in the dot in a
smaller energy scale $\Gamma^{\prime}_{m}$ and gives rise to an additional peak
in $L$ at $T \sim \Gamma^{\prime}_{m}$, whose sign is opposite to that at
$T\sim\Gamma_{m}$. In the strong-coupling regime this additional peak can cause
a non-monotonic behavior of $L$ with respect to the dot gate. Finally, we
examine the case in which an ordinary spin-polarized fermion is coupled to the
dot and identify the fingerprint of MFs by comparing two cases.
