Blockade and Staircase Phenomena of Holes in Mesoscopic Scale $\lambda $ -Deoxyribonucleic Acid/SiO2/Si Structure

Coulomb blockade/staircase phenomena of deoxyribonucleic acid (DNA) molecule have been observed so far. Here, we show a non-Coulomb blockade/staircase phenomenon of holes in a mesoscopic scale λ-DNA, which serves as a channel on SiO
₂
/Si structure. It is considered that the phenomena are due to the penetration of the wave function in the DNA into the Si source and drain electrodes via the contacts constructed by DNA/allyl glycidyl ether/Si electrodes.