Crystallization and melting in metal-semiconductor multilayers.
نویسندگان
چکیده
The amorphous-to-microcrystalline phase transition of Ge in Pb/Ge multilayer geometry has been investigated as a function of layer thicknesses with the use of high-temperature x-raydiA'raction techniques. During crystallization, the modulation structure is destroyed and the Pb texture improves. In addition, the crystallization temperature decreases with decreasing amorphous Ge thickness and increases with decreasing thickness of the metallic component. The results imply that the crystallization is interfacially initiated and possibly afFected by electron transfer. A study of two-dimensional melting for Pb in this system was attempted unsuccessfully because the layered structure was destroyed by the crystallization that occurs substantially below the melting temperature.
منابع مشابه
Tuning interlayer exchange coupling of co-doped TiO2/VO2 multilayers via metal-insulator transition.
Reversibly switching interlayer exchange coupling (IEC) of magnetic semiconductor multilayers between ferromagnetic (FM) and antiferromagnetic (AFM) modes is a difficult but key issue for fabricating semiconductor giant magnetoresistance devices. Here, we show that such tunable IEC is achievable around room temperature in Co-doped TiO2/VO2 diluted magnetic semiconductor multilayers. On the basi...
متن کاملPolaron Crystallization and Melting: Effects of the Long-range Coulomb Forces
On examining the stability of a Wigner crystal in an ionic dielectric, two competitive effects due to the polaron formation are found to be important: (i) the screening of the Coulomb force 1/εsr, which destabilizes the crystal, compensated by (ii) the increase of the carrier mass (polaron mass). The competition between the two effects is carefully studied, and the quantum melting of the polaro...
متن کاملLow-Temperature Synthesis of Ultra-High-Temperature Coatings of ZrB 2 Using Reactive Multilayers
We demonstrate a route to synthesize ultra high-temperature ceramic coatings of ZrB2 at temperatures below 1,300 K using Zr/B reactive multilayers. Highly textured crystalline ZrB2 is formed at modest temperatures, because of the absence of any oxide at the interface between Zr and B, and the very short diffusion distance that is inherent to the multilayer geometry. The kinetics of the ZrB2 for...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review. B, Condensed matter
دوره 38 7 شماره
صفحات -
تاریخ انتشار 1988