  The reconstructions of the InP(001) surface prepared by molecular beam
epitaxy have been studied with in situ reflection high-energy electron
diffraction (RHEED) and scanning tunneling microscopy (STM). The growth chamber
contains a highly accurate temperature measurement system and uses a
solid-source, cracked phosphorus, valved effusion cell. Five InP(001)
reconstructions are observed with RHEED by analyzing patterns in three
principal directions. Under a fixed P2 flux, decreasing the substrate
temperature gives the following reconstructions: c(2x8), (2x4), (2x1), (2x2),
and c(4x4). In situ STM images reveal that only two of these reconstructions
yields long-range periodicity in real space. InP(001) does not form the metal
rich (4x2) reconstruction, which is surprising because the (4x2) reconstruction
has been coined the universal surface reconstruction since all III-V(001)
surfaces were thought to favor its formation.
