A remark on potentially semi-stable representations of Hodge-Tate type (0,1)

In this note we complement a part of a theorem of Fontaine-Mazur. We show that if $(V,\rho )$ is an irreducible finite dimensional representation of the Galois group $Gal(\bar{K}\mathrm{/}K)$ of a finite extension of $K{\text{Q}}_p$, of Hodge-Tate type $(0,1)$ then it is potentially semi-stable if and only if it is potentially crystalline. This was proved by Fontaine-Mazur for dimension two and $p\ge 5$ by their classfication theorem.