Electric Field Control of Metal–Insulator Transition in Charge-Ordered Fe2BO4

The structure and electric properties of single-crystal Fe2BO4 are measured by in situ high-resolution X-ray diffraction combined with current–voltage (I–V) measurements. A superstructure due to charge ordering (CO) is found at room temperature, and the superstructure peak disappears when the applie...

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Bibliographic Details
Published in:ACS applied electronic materials 2024-05, Vol.6 (5), p.3078-3083
Main Authors: Yang, Tieying, Liu, Chunze, Zheng, Xu, Yin, Shuaishuai, Zhou, Yong, Yang, Huaixin, Li, Xiaolong
Format: Article
Language:English
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Summary:The structure and electric properties of single-crystal Fe2BO4 are measured by in situ high-resolution X-ray diffraction combined with current–voltage (I–V) measurements. A superstructure due to charge ordering (CO) is found at room temperature, and the superstructure peak disappears when the applied electric field exceeds a certain threshold. I–V characteristics show a sharp resistance drop, indicating a metal–insulator transition (MIT) induced by applied voltage and revealing electron–lattice coupling, which is due to the Joule heating effect. Moreover, the Fe2BO4 single crystal exhibits a multidomain monoclinic phase in its original state, which transforms into a single-domain orthorhombic phase when a voltage of 200 V is applied. MIT, CO state collapse, and structural phase change have been observed simultaneously and indicate that the CO structural phase change can be controlled by an electric field.
ISSN:2637-6113
2637-6113
DOI:10.1021/acsaelm.4c00359