Abstract
The topological bandgap of graphene induced by intrinsic spin-orbit coupling is so narrow that it was experimentally identified for the first time only in 2019. In this work, the authors use a specific electron spin resonance technique, based on photoconductivity measurements using graphene-based terahertz detectors, to probe zero-field splittings of graphene as a function of temperature. They demonstrate experimentally that the intrinsic spin-orbit coupling and the staggered sublattice potential, which reduces the topological gap, are both temperature dependent.
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