A quantum bound on the 1/f noise in semiconductors with a conical energy-momentum dispersion

The quantum indeterminacy caused by non-commutativity of observables at different times sets a lower bound on the voltage noise power spectrum in any conducting material. This is calculated explicitly case semiconductors with conical energy-momentum dispersion charge carriers. It possesses all characteristic properties 1/f noise. Its momentum decomposition found to be singular zero particle momentum, measurable consequence being sharp peak magnitude small carrier density. In application monolayer graphene, this becomes M-shaped account continuous transition from electron hole conductivity. A comparison experimental data made which demonstrates that close and congruent observed.