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The electronic and transport properties of graphene modulated by magneticbarrier arrays are derived for finite temperature. Prominent conductance gaps,originating from quantum interference effects are found in the periodic arraycase. When a structural defect is inserted in the array, sharp defect modes ofhigh conductance appear within the conductance gaps. These modes can be shiftedby local doping in the defect region resulting into sensing of the chemicalmolecules that adhere on the graphene sheet. In general it is found thatsensitivity is strongly dependent on temperature due to smoothing out of thedefect-induced peaks and transport gaps. This temperature dependence, however,offers the added capability for sub-mK temperature sensing resolution, and thusan opportunity towards ultra-sensitive combined electrochemical-calorimetricsensing.

Highly Sensitive Gas and Temperature Sensor Based on Conductance Modulation in Graphene with Multiple Magnetic Barriers