Formation of Palladium Silicide on Heavily Doped Si(001) Substrates Using Ti Intermediate Layer

The formation of palladium silicide on Pd/Ti/Si systems with and without heavy B-doping has been investigated. For comparison, Pd2Si was also formed on Pd/Si systems. The agglomeration of Pd2Si could be retarded in Pd/Ti/Si systems with and without B-doping after annealing at 600 � C. The existence of the Ti layer could improve the thermal stability of Pd2Si. In addition, epitaxial or highly oriented Pd2Si formed in Pd/Ti/Si systems. The two orientation relationships of Pd2Si layers were identified to be Pd2Si½1� 1 10�k Si½ � 1 110� and Pd2Si½110�k Si½001�, and Pd2Si½100�k Si½ � 1 110� and Pd2Si½001�k Si½001�. The formation of strained epitaxial Pd2Si layers was found in Pd/Ti/Si systems. The improvement in the thermal stability of Pd2Si and the formation of epitaxial or highly oriented Pd2Si in Pd/Ti/Si systems were observed with and without B- doping

Formation of Palladium Silicide Thin Layers on Si(110) Substrates

The formation of palladium silicide thin films from Pd/Si(110) and Pd/Si(001) systems with and without a Ti intermediate layer has been investigated. The existence of a Ti layer could improve the thermal stability of Pd2Si thin layers in Pd/Ti/Si(001). In addition, an epitaxial or highly oriented Pd2Si layer is formed in Pd/Ti/Si systems. However, the roughness of the Pd2Si/Si interface is observed in Pd/Ti/Si(110) systems, while the flatnesses of the Pd2Si/Si interface is observed in Pd/Ti/Si(001)

Growth and applications of GeSn-related group-IV semiconductor materials

We review the technology of Ge1−xSnx-related group-IV semiconductor materials for developing Si-based nanoelectronics. Ge1−xSnx-related materials provide novel engineering of the crystal growth, strain structure, and energy band alignment for realising various applications not only in electronics, but also in optoelectronics. We introduce our recent achievements in the crystal growth of Ge1−xSnx-related material thin films and the studies of the electronic properties of thin films, metals/Ge1−xSnx, and insulators/Ge1−xSnx interfaces. We also review recent studies related to the crystal growth, energy band engineering, and device applications of Ge1−xSnx-related materials, as well as the reported performances of electronic devices using Ge1−xSnx related materials

Impedance spectroscopy of GeSn/Ge heterostructures by a numerical method

peer reviewedIn this work, we investigated the electrical characteristics of p-GeSn/p-Ge and p-GeSn/n-Ge structures obtained by simulation of the semiconductor equations. We developed a numerical formalism based on a drift-diffusion model including a trap level and applied it to typical GeSn-based heterostructures by focusing on the electrical response under small-signal alternating current regime. The results demonstrate that our method provides an access to both microscopic and macroscopic properties, and thereon, to a physical interpretation of the electrical characteristics of GeSn-based structures by linking measurable quantities to micro-scale variations in the structures

Impedance Spectroscopy of GeSn-based Heterostructures

peer reviewedIn this work, we investigated the electrical characteristics of p-GeSn/p-Ge and p-GeSn/n-Ge structures obtained by simulation of the basic semiconductor equations. We developed a numerical formalism based on a drift-diffusion model including a trap level and applied it to typical GeSn-based heterostructures by focusing on the electrical response under small-signal alternating current regime. The results demonstrate that our method provides an access to both microscopic and macroscopic properties, and thereon, to a physical interpretation of the electrical characteristics of GeSn-based structures by linking measurable quantities to micro-scale variations in the structures