Observation of the memory steps in graphene at elevated temperatures
Abstract
We found that the current-voltage characteristics of graphene transistors exhibit an intriguing feature—an abrupt change in the current near zero gate bias at temperatures above 500 K. The strength of this effect, which we refer to as the memory step by analogy with the memory dips—known phenomenon in electron glasses, depends on the rate of the gate voltage sweep. The slower the sweep, the more pronounced is the step in the current. Despite differences in examined graphene transistors, the memory step always appears at Vg≈0 V. The observed memory steps are likely related to the slow relaxation processes in graphene. This new phenomenon in graphene can be used for applications in sensors and switches.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 30, 2011
- Source ID
- 10.1063/1.3596441
Entities
People
- Alexander A. Balandin
- Guanxiong Liu
- Michael S. Shur
- Sergey L. Rumyantsev
Organizations
- Defense Advanced Research Projects Agency
- Ioffe Institute
- National Science Foundation
- Rensselaer Polytechnic Institute
- University of California, Riverside