Very large magnetoresistive graphene disk with negative permittivity
At room temperature a large magnetoresistance (MR) of up to 70% is observed in graphene. Both graphene size and surface functionality influence the MR behavior significantly. The conductivity increases linearly with increasing temperature and a unique negative permittivity over a wide frequency range from 10 3 to 10 6 Hz is observed at room temperature.
Publication Source (Journal or Book title)
Zhu, J., Wei, S., Haldolaarachchige, N., He, J., Young, D., & Guo, Z. (2012). Very large magnetoresistive graphene disk with negative permittivity. Nanoscale, 4 (1), 152-156. https://doi.org/10.1039/c1nr11101a