Graphene measurements show energy-loss and quantum-coherence exponents diverge under gate control
A multi-institutional team of researchers used gated epitaxial graphene to demonstrate that electron scattering exponents behave differently when voltage is applied.
Researchers extracted two distinct exponents
Scientists independently pulled the inelastic scattering exponent and the dephasing exponent from current-heating measurements. They also used weak-localization analysis to separate these values within the graphene samples. The team found that these two metrics do not necessarily follow the same behavior.
Gate voltage changes how electrons scatter
The contrasting dependence on gate voltage indicates that energy relaxation and loss of quantum phase coherence are governed by different microscopic processes. This divergence suggests separate mechanisms control how electrons lose energy versus how they lose their quantum state.
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