arxiv: 1311.2688 · v1 · pith:PNGY74O4new · submitted 2013-11-12 · ❄️ cond-mat.mtrl-sci · cond-mat.mes-hall

Conductance modulation in topological insulator Bi2Se3 thin films with ionic liquid gating

Jaesung Son , Karan Banerjee , Matthew Brahlek , Nikesh Koirala , Seoung-Ki Lee , Jong-Hyun Ahn , Seongshik Oh , Hyunsoo Yang This is my paper

classification ❄️ cond-mat.mtrl-sci cond-mat.mes-hall

keywords conductancemodulationchangetemperaturetopologicalbi2se3gatinginsulator

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A Bi2Se3 topological insulator field effect transistor is investigated by using ionic liquid as an electric double layer gating material, leading to a conductance modulation of 365% at room temperature. We discuss the role of charged impurities on the transport properties. The conductance modulation with gate bias is due to a change in the carrier concentration, whereas the temperature dependent conductance change is originated from a change in mobility. Large conductance modulation at room temperature along with the transparent optical properties makes topological insulators as an interesting (opto)electronic material.

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Conductance modulation in topological insulator Bi2Se3 thin films with ionic liquid gating

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