  The propagation of surface electromagnetic waves along a uniform magnetic
field is studied in a quantum electron-hole semiconductor plasma. A new forward
propagating mode, not reported before, is found by the effect of quantum
tunneling, which otherwise does not exist. In the classical limit
($\hbar\rightarrow 0$) one of the low-frequency modes is found similar to an
experimentally observed one in $n$-type InSb at room temperature. The surface
modes are shown to be significantly modified in the case of high-conductivity
semiconductor plasmas where electrons and holes may be degenerate. The effects
of the external magnetic field and the quantum tunneling on the surface wave
modes are discussed.
