Finite-temperature effects on conductance modulation by local doping in graphene with multiple magnetic barriers. (10th November 2015)

• Record Type: Journal Article
• Authors: Myoung, Nojoon; Lidorikis, Elefterios
• Is Part Of: 2D materials. Volume 2:Number 4(2015)
• Publication Date: 2015-11-10
• Subjects: graphene -- ballistic transport -- conductance modulation -- transfer matrix method -- gas sensing -- temperature sensing; Graphene -- Periodicals; Materials science -- Periodicals; Nanostructured materials -- Periodicals; 620.115
• DOI: 10.1088/2053-1583/2/4/045007
• Languages: English
• ISSNs: 2053-1583

Abstract

Abstract: The electronic and transport properties of graphene modulated by magnetic barrier arrays are derived at finite temperatures. Prominent conductance gaps, originating from quantum interference effects are found in the periodic array case. When a structural defect is inserted in the array, sharp defect modes of high conductance appear within the conductance gaps. These modes are shifted by local doping in the defect region, resulting in large contrast in the ballistic conductance of graphene sheet. In general it is found that sensitivity is strongly dependent on temperature due to smoothing out of the defect-induced peaks and transport gaps. This temperature dependence, however, offers the added capability for sub-mK temperature sensing resolution, and thus an opportunity towards ultra-sensitive combined electrochemical-calorimetric sensing.