Effect of strain on the carrier mobility in heavily doped p-type Si.
We present an experiment that gives insight into the origin of the dependence of the hole mobility (mu) on the dopant species in heavily doped p-type Si under low electrical field. The Hall carrier concentration and mobility were measured in Si coimplanted with B and Ga in the 0.1-2 x 10{20} cm{-3} concentration range. The strain induced by substitutional dopants, detected by high resolution x-ray diffraction, was varied by changing the relative B and Ga concentration. The effect of strain on mobility was disentangled and a linear relationship between 1/mu and the perpendicular strain was found.
Romano
Lucia
L
CNR-MATIS and Dipartimento di Fisica e Astronomia, Università di Catania, Via S. Sofia 64, I-95123 Catania, Italy. lucia.romano@ct.infn.it
Piro
Alberto Maria
AM
Grimaldi
Maria Grazia
MG
Bisognin
Gabriele
G
Napolitani
Enrico
E
De Salvador
Davide
D