Fabrication of Novel Si Double-Barrier Structures and Their Characteristics

A novel Si (silicon)-based double-barrier structure (DBS) is newly proposed to study Si resonant tunneling devices. To form a thin Si single-crystal plate as a quantum well, anisotropic wet chemical etching and thermal oxidation are adopted. The DBS has a 43 nm-wide Si quantum well and 2.3 nm-thick SiO2 barriers. The electrical characteristic exhibits negative differential conductance (NDC).