Self-Organized Formation of Compositionally Modulated ZnSe1-xTex Superlattices.

We report the observation of periodic compositional modulation in ZnSe{sub 1{minus}{ital x}}Te{sub {ital x}} alloys grown by molecular beam epitaxy on vicinal (100) GaAs substrates. The period is highly regular, with typical values between 18 and 32 A, and is long range in character. X-ray diffraction indicates that the composition varies approximately sinusoidally, resulting in superlattices that are expected to have unique physical properties.