A nonlinear transport device with no intrinsic threshold
Abstract
A ballistic rectifier, based on guidance of carriers by a triangular antidot, is shown to be both experimentally and theoretically capable of operating for weak signals. At T = 4.2 K, we find that the ballistic rectifier works when the input voltage is as low as 0.5 mV, the same order ofkBT. Based on an extended Landauer-Büttiker formula for nonlinear transport, we show that even when the input signal is much smaller thankBT, temperature has no obvious influence on the rectification effect.
- Publication:
-
Superlattices and Microstructures
- Pub Date:
- January 1999
- DOI:
- 10.1006/spmi.1998.0646
- Bibcode:
- 1999SuMi...25..269S