Negative differential resistance in trench-type narrow InGaAs quantum wire

Abstract

A trench-type narrow InGaAs quantum-wire field-effect transistor (QWRFET) on a V-grooved (311)A InP substrate has been successfully fabricated. The trench-type InGaAs QWR-FET with 50 nm gate-length has demonstrated clear negative differential resistance (NDR) characteristics based on real space transfer (RST) with a high peak-to-valley current ratio (PVR=6.2) and a low onset voltage (V/sub NDR/) of 0.1 V. Such a low V/sub NDR/ has not been reported before.