Electrostatic carrier doping of charge-ordered YbFe2O4thin films using ionic liquids

Kohei Fujiwara, Tatsuya Hori, Hidekazu Tanaka

Research output: Contribution to journalArticlepeer-review


We report the modulation of electrical properties of charge-ordered YbFe2O4 films using electrostatic carrier doping. By utilizing the current switching effect under a high DC electric field as a probe, we detected the charge-ordered phase in the c-axis-oriented YbFe2O4 films grown by pulsed-laser deposition. A three-terminal electric double-layer device with a thin channel of YbFe2O4 and an ionic liquid (IL) gate dielectric showed reversible modulation of channel conductance under a positive gate voltage. Furthermore, we demonstrated that conductance modulation could be enhanced by customizing the molecular structure of the IL.

Original languageEnglish
Article number083001
JournalApplied Physics Express
Issue number8
Publication statusPublished - 2021 Aug


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