A measurement technique for circumventing hysteresis and conductance drift in carbon nanotube field-effect transistors

作者：Tunnell Andrew^*; Ballarotto Vincent; Cumings John

来源：Nanotechnology, 2014, 25(4): 045705.

DOI：10.1088/0957-4484/25/4/045705

• carbon nanotubes
• hysteresis
• Preisach

We present a measurement protocol that effectively eliminates both the hysteresis and the temporal drift typically observed in the channel conductance of single-walled carbon nanotube field-effect transistors (SWNT FETs) during the application of gate voltages. Before each resistance measurement, the gate is first stepped through a series of alternating positive and negative voltages to produce a neutral charge distribution within the device. This process is highly effective at removing the hysteresis in the channel conductance, and time-dependent measurements further demonstrate that the drain current is stable and single-valued, independent of the prior measurement history. The effectiveness of this method can be understood within the Preisach hysteresis model, which we demonstrate as a useful framework to predict the observed results.

• 出版日期2014-1-31