  Enhanced proximity effect by mid gap Andreev resonant state (MARS) in a
diffusive normal metal / insulator / triplet superconductor (DN/TS) junction is
studied based on the Keldysh-Nambu quasiclassical Green's function formalism.
By choosing a p-wave superconductor as a typical example of TS, conductance of
the junction and the spatial variation of quasiparticle local density of states
(LDOS) in DN are calculated as the function of the magnitudes of the resistance
$R_{d}$, Thouless energy in DN and the transparency of the insulating barrier.
The resulting conductance spectrum has a zero bias conductance peak (ZBCP) and
LDOS has a zero energy peak (ZEP) except for $\alpha = \pi/2$ $(0 \leq \alpha
\leq \pi/2)$, where $\alpha$ denotes the angle between the lobe direction of
the p-wave pair potential to the normal to the interface. These peaks are
revealed to be suppressed by applying a magnetic field. When the magnitude of
$R_{d}/R_{0}$ is sufficiently large, the total zero voltage resistance of the
junction is almost independent of the $R_{d}$ for $\alpha \neq \pi/2$. The
extreme case is $\alpha=0$, where total zero voltage resistance is always
$R_{0}/2$. Based on these results, a crucial test to identify triplet pairing
superconductors based on tunneling experiments is proposed.

Superconductivity