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arXiv · 1407.4026

Electrical Modulation of Superconducting Critical Temperature in Liquid-Gated Thin Niobium Films

Jiman Choi·Pradheesh R.·Hyungsang Kim·Hyunsik Im·Yonuk Chong·Dong-Hun Chae
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Abstract

We demonstrate that the superconducting critical temperature (Tc) of thin niobium films can be electrically modulated in a liquid-gated geometry device. Tc can be suppressed and enhanced by applying positive and negative gate voltage, respectively, in a reversible manner within a range of about 0.1 K. At a fixed temperature below Tc, we observed that the superconducting critical current can be modulated by gate voltage. This result suggests a possibility of an electrically-controlled switching device operating at or above liquid helium temperature, where superconductivity can be turned on or off solely by the applied gate voltage.

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Jiman Choi, Pradheesh R., Hyungsang Kim, Hyunsik Im, Yonuk Chong, Dong-Hun Chae. 2014-07-15. Electrical Modulation of Superconducting Critical Temperature in Liquid-Gated Thin Niobium Films. https://doi.org/10.1063/1.4890085

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