Transition between Particle Nature and Wave Nature in Single-Walled Carbon Nanotube Device
A convertible transistor that can operate as a resonant-tunneling transistor (RTT) and also as a single-hole transistor (SHT) using single-walled carbon nanotube (SWNT) is fabricated. The transition between RTT and SHT is achieved by modulating the coupling strength between the electrode and the quantum island using gate voltage change. Schottky barriers at the contact between the SWNT and the electrodes act as tunneling barriers. The thicknesses of the tunneling barriers are modulated by the gate voltage change, and the strength of the coupling between the electrode and quantum island is also changed. The characteristics of the convertible transistor can be observed up to 100 K.
This study investigates the effects of Pierson-Moskowitz, Jonswap spectrum that are typical irregular wave spectrums for wind turbine system with jacket support structure. Also various offshore environmental parameters based on korean local condition were used in our study. The loads acting on the system was considered by referring to the Design Load Case from IEC guide line. And improved von Karman model was used as a turbulence model. As a result, various significant wave height and peak spectral period cause noticeable difference of extreme and fatigue loads prediction.