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Publications
Publications (10)
Phase change memory devices are typically reset by melt-quenching a material to radically lower its electrical conductance. The high power and concomitantly high current density required to reset phase change materials is the major issue that limits the access times of 3D phase change memory architectures. Phase change superlattices were developed...
The switchable optical and electrical properties of phase change materials (PCMs) are finding new applications beyond data storage in reconfigurable photonic devices. However, high power heat pulses are needed to melt-quench the material from crystalline to amorphous. This is especially true in silicon photonics, where the high thermal conductivity...
The switchable optical and electrical properties of phase change materials (PCMs) are finding new applications beyond data storage in reconfigurable photonic devices. However, high power heat pulses are needed to melt-quench the material from crystalline to amorphous. This is especially true in silicon photonics, where the high thermal conductivity...
Chalcogenide phase change materials (PCMs) have been extensively applied in data storage, and they are now being proposed for high resolution displays, holographic displays, reprogrammable photonics, and all-optical neural networks. These wide-ranging applications all exploit the radical property contrast between the PCMs’ different structural phas...
Chalcogenide phase change materials (PCMs) have been extensively applied in data storage, and they are now being proposed for high resolution displays, holographic displays, reprogrammable photonics, and all-optical neural networks. These wide-ranging applications all exploit the radical property contrast between the PCMs different structural phase...
High quality van der Waals chalcogenides are important for phase change data storage, thermoelectrics, and spintronics. Using a combination of statistical design of experiments and density functional theory, we clarify how out-of-equilibrium van der Waals epitaxial deposition methods can improve the crystal quality of Sb 2 Te 3 films. We compare fi...
The objective of this paper is to understand the origin of the unusually large optical gap in amorphous chalcogenide phase change materials. The optical contrast between the crystalline and amorphous forms of phase‐change materials (PCM) is so marked as to make it ideal for data storage. Various explanations for this gap have been given, including,...
Questions
Questions (2)
The grown film is textured Sb2Te3 and verified by XRD, only (0 0 l) peaks were observed in XRD patterns. I tried to dope another material and want to check the change of lattice constant. Because I want to check the in-plane lattice constant, then I collected the GIXRD pattern. Is it possible to use FullProf Suite or TOPAS to do the Rietveld Refinement for this textured films?
After that, I need to get the doped Sb2Te3 refinement. I tried to use FullProf do this and the error information "Singular Matrix" shown. How do I run FullProf to get the structure information?
The XRD pattern of the doped sample attached as below.
Thank you!
I am trying to know more theories and mechanisms about thin film growth? Does anyone list some reading recommendation about it and give your reason why these books are better? I found a book called Materials Science of Thin Films: Deposition and Structure by Milton Ohring, is it suitable for me?
