Reversible electrochemical modulation of the superconducting transition temperature of LiTi2O4 ultrathin films by ionic liquid gating

S. Maruyama; J. Shin; X. Zhang; R. Suchoski; S. Yasui; K. Jin; R. L. Greene; I. Takeuchi

doi:10.1063/1.4932551

Reversible electrochemical modulation of the superconducting transition temperature of LiTi₂O₄ ultrathin films by ionic liquid gating

S. Maruyama, J. Shin, X. Zhang, R. Suchoski, S. Yasui, K. Jin, R. L. Greene, I. Takeuchi

ENG - Applied Chemistry

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We demonstrate in situ modulation of the superconducting transition temperature (T_c) of LiTi₂O₄ thin films by ionic liquid gating. 15nm thick LiTi₂O₄ thin films grown on MgAl₂O₄ substrates with the pristine T_c of 11.5K was patterned into electric double-layer transistor devices for gating using ionic liquid with or without Li⁺ ions. The T_c of the LiTi₂O₄ thin film was found to decrease with a negative gate voltage for gating with either pure ionic liquid or Li⁺ containing ionic liquid. On the other hand, the recovery of T_c is observed at a positive gate voltage only for gating with the Li⁺ containing ionic liquid. The present observation suggests the possibility of reversible electrochemical modulation of superconducting properties by lithiation and delithiation.

Original language	English
Article number	142602
Journal	Applied Physics Letters
Volume	107
Issue number	14
DOIs	https://doi.org/10.1063/1.4932551
Publication status	Published - 2015 Oct 5

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Reversible electrochemical modulation of the superconducting transition temperature of LiTi2O4 ultrathin films by ionic liquid gating",

abstract = "We demonstrate in situ modulation of the superconducting transition temperature (Tc) of LiTi2O4 thin films by ionic liquid gating. 15nm thick LiTi2O4 thin films grown on MgAl2O4 substrates with the pristine Tc of 11.5K was patterned into electric double-layer transistor devices for gating using ionic liquid with or without Li+ ions. The Tc of the LiTi2O4 thin film was found to decrease with a negative gate voltage for gating with either pure ionic liquid or Li+ containing ionic liquid. On the other hand, the recovery of Tc is observed at a positive gate voltage only for gating with the Li+ containing ionic liquid. The present observation suggests the possibility of reversible electrochemical modulation of superconducting properties by lithiation and delithiation.",

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T1 - Reversible electrochemical modulation of the superconducting transition temperature of LiTi2O4 ultrathin films by ionic liquid gating

AU - Maruyama, S.

AU - Shin, J.

AU - Zhang, X.

AU - Suchoski, R.

AU - Yasui, S.

AU - Jin, K.

AU - Greene, R. L.

AU - Takeuchi, I.

PY - 2015/10/5

Y1 - 2015/10/5

N2 - We demonstrate in situ modulation of the superconducting transition temperature (Tc) of LiTi2O4 thin films by ionic liquid gating. 15nm thick LiTi2O4 thin films grown on MgAl2O4 substrates with the pristine Tc of 11.5K was patterned into electric double-layer transistor devices for gating using ionic liquid with or without Li+ ions. The Tc of the LiTi2O4 thin film was found to decrease with a negative gate voltage for gating with either pure ionic liquid or Li+ containing ionic liquid. On the other hand, the recovery of Tc is observed at a positive gate voltage only for gating with the Li+ containing ionic liquid. The present observation suggests the possibility of reversible electrochemical modulation of superconducting properties by lithiation and delithiation.

AB - We demonstrate in situ modulation of the superconducting transition temperature (Tc) of LiTi2O4 thin films by ionic liquid gating. 15nm thick LiTi2O4 thin films grown on MgAl2O4 substrates with the pristine Tc of 11.5K was patterned into electric double-layer transistor devices for gating using ionic liquid with or without Li+ ions. The Tc of the LiTi2O4 thin film was found to decrease with a negative gate voltage for gating with either pure ionic liquid or Li+ containing ionic liquid. On the other hand, the recovery of Tc is observed at a positive gate voltage only for gating with the Li+ containing ionic liquid. The present observation suggests the possibility of reversible electrochemical modulation of superconducting properties by lithiation and delithiation.

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Reversible electrochemical modulation of the superconducting transition temperature of LiTi₂O₄ ultrathin films by ionic liquid gating

Abstract

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