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IRG I

Electrostatic Control of Materials

The vision of IRG-1, Electrostatic Control of Materials, is to use a set of new techniques for electrostatic manipulation of charge carrier density at material surfaces as a universal platform to probe and control electronic properties in novel materials. Recently developed methods based on ionic liquids, ionic gels, and solid electrolyte structures are being used to generate unprecedented charge densities in a variety of materials, up to significant fractions of an electron per unit cell, enabling dramatic property modification. Opportunities include reversible control of magnetic order and properties, fine-tuning of insulator-metal and superconducting transitions, novel electronic and opto-electronic device concepts, discovery of new electronic and magnetic phases, and determination of the limits of transport in new materials. The IRG is exploring three classes of materials of exceptional current interest as test cases: (i) organic conductors; (ii) metal chalcogenides; and (iii) complex oxides.