Properties of titanium in InP

Abstract

Experiments are performed on n-type InP/Ti single crystals extracted from an ingot grown in a two zones gradient freeze furnace: in DLTS the authors find a level E_c-0.56 eV. DLOS and OA experiments confirm the existence of this trap and moreover show an internal transition peak at about 0.6 eV. They interpret this level as the donor level Ti³⁺/Ti⁴⁺ and the transition peaking at 0.6 V as the ²E to ²T₂ internal transition Ti³⁺(3d¹). They conclude that the titanium does not create a deep acceptor level in the gap of InP.