We studied electrical resistance of a single-crystalline SmB6 sample with a focus on the region of the "low-temperature resistivity plateau". Our observations did not show any true saturation of the electrical resistance at temperatures below 3 K down to 70 mK. According to our findings, temperature dependence of the electrical conduction in a certain temperature interval above 70 mK can be decomposed into a temperature-independent term and a temperature-activated term that can be described by variable-range hopping formula for two-dimensional systems, exp[-T0/T)^1/3]. Thus, our results indicate importance of hopping type of electrical transport in the near-surface region of SmB6.
@article{arxiv.1709.01990,
title = {Low temperature resistivity studies of SmB6: Observation of twodimensional variable-range hopping conductivity},
author = {Marianna Batkova and Ivan Batko and Slavomir Gabani and Emil Gazo and Elena Konovalova and Vladimir Filippov},
journal= {arXiv preprint arXiv:1709.01990},
year = {2017}
}