A novel transistor, introducing metal and iusulator and using the quantum interference of hot electrons in the conduction band of an insulator as the operation principle, is proposed. The metal-insulator combination contributes to the reduction of the device size and obtaining high current density, low resistivity, and small capacitance, which result in the decrease of the response time of the device. Also, since this combination has the extremely high conduction band discontinuity, strong quantum interference can be obtained. The static I-V characteristics are analyzed and it is shown that there are multiple peaks useful for a variety of signal processing and logic applications. In addition, since the gradient between each peak and valley in the characteristics is steep, the device used as an amplifier has a high transconductance which contributes to the reduction of the response time. We show the possibility of subpicosecond response (0.2 ps) of this device theoretically.

A novel electronic device named Space Charge Limited Insulator Tetroide (SCLIT), which uses space charge limited current in insulator of a metal-insulator structure is proposed. A possibility for high speed response (fγ1.1 THz) is estimated theoretically. The static characteristics are also shown.