Mongillo, Massimo; Spathis, Panayotis N; Katsaros, GeorgiosIST Austria; De Franceschi, Silvano; Gentile, Pascal; Rurali, Riccardo; Cartoixà, Xavier
Metal silicides formed by means of thermal annealing processes are employed as contact materials in microelectronics. Control of the structure of silicide/silicon interfaces becomes a critical issue when the characteristic size of the device is reduced below a few tens of nanometers. Here, we report on silicide clustering occurring within the channel of PtSi/Si/PtSi Schottky-barrier transistors. This phenomenon is investigated through atomistic simulations and low-temperature resonant-tunneling spectroscopy. Our results provide evidence for the segregation of a PtSi cluster with a diameter of a few nanometers from the silicide contact. The cluster acts as a metallic quantum dot giving rise to distinct signatures of quantum transport through its discrete energy states.
Physical Review X
This work was supported by the Agence Nationale de la Recherche and by the EU through the ERC Starting Grant HybridNano
Mongillo M, Spathis P, Katsaros G, et al. PtSi clustering in silicon probed by transport spectroscopy. Physical Review X. 2014;3(4). doi:10.1103/PhysRevX.3.041025
Mongillo, M., Spathis, P., Katsaros, G., De Franceschi, S., Gentile, P., Rurali, R., & Cartoixà, X. (2014). PtSi clustering in silicon probed by transport spectroscopy. Physical Review X, 3(4). https://doi.org/10.1103/PhysRevX.3.041025
Mongillo, Massimo, Panayotis Spathis, Georgios Katsaros, Silvano De Franceschi, Pascal Gentile, Riccardo Rurali, and Xavier Cartoixà. “PtSi Clustering in Silicon Probed by Transport Spectroscopy.” Physical Review X 3, no. 4 (2014). https://doi.org/10.1103/PhysRevX.3.041025.
M. Mongillo et al., “PtSi clustering in silicon probed by transport spectroscopy,” Physical Review X, vol. 3, no. 4, 2014.
Mongillo M, Spathis P, Katsaros G, De Franceschi S, Gentile P, Rurali R, Cartoixà X. 2014. PtSi clustering in silicon probed by transport spectroscopy. Physical Review X. 3(4).
Mongillo, Massimo, et al. “PtSi Clustering in Silicon Probed by Transport Spectroscopy.” Physical Review X, vol. 3, no. 4, American Physical Society, 2014, doi:10.1103/PhysRevX.3.041025.