Coupling heat and electricity: towards new thermoelectrics

Thermo-electric transport in Van der Waal junctions:

When two planar atomic membranes are placed within the van der Waals distance, the charge and heat transport across the interface are coupled by the rules of momentum conservation and structural commensurability, lead to outstanding thermoelectric properties. Our research focuses on exploring the electric and thermoelectric transport across the van der Waals gap formed in twisted bilayer graphene (tBLG). The Tunability of cross-plane Seebeck effect in van der Waals junctions may be valuable in creating a new genre of versatile thermoelectric systems with layered solids.

Ref: “Seebeck coefficient of a single van der Waals junction in twisted bilayer graphene”, P. S. Mahapatra, K. Sarkar, H. R. Krishnamurthy, S. Mukerjee and A. Ghosh(accepted Nano Letters DOI:10.1021/acs.nanolett.7b03097)

Thermoelectric properties of bimetallic nanowires:

One dimensional crystalline structures such as nanowires and nanotubes have been extensively studied for past two decades due to their unique electronic, optical, thermal and magnetic properties. Any individual excitation becomes a collective one in case of 1D, which invalidates the framework of FL theory and impart 1D its unique features. We have been trying to understand the physics of electric and thermoelectric transport in bimetallic Au-Pt nanowires.