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Related Experiment Video

Updated: Oct 10, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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Published on: June 9, 2023

Electroresistance in multipolar antiferroelectric Cu₂Se semiconductor.

Hui Bai^1,2, Jinsong Wu^3,4, Xianli Su⁵

¹State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070, Wuhan, China.

Nature Communications

|December 11, 2021

Summary

Researchers observed reversible resistance changes in thermoelectric copper selenide (α-Cu₂Se). This discovery in multipolar antiferroelectric semiconductors could enable future efficient large-scale computations.

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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

Area of Science:

Condensed matter physics
Materials science
Solid-state chemistry

Background:

Electric field-induced resistance changes are crucial for advanced computing.
The physical mechanisms behind electroresistance are not well understood.
Thermoelectric materials offer potential for novel electronic applications.

Purpose of the Study:

To investigate the electroresistance phenomenon in thermoelectric α-Cu₂Se.
To elucidate the underlying physical mechanisms of observed resistance changes.
To explore the potential of α-Cu₂Se for future computational hardware.

Main Methods:

Experimental observation of electrically reversible resistance changes.
Analysis of spontaneous electric dipoles in the ordered α-Cu₂Se phase.
Identification of α-Cu₂Se as a multipolar antiferroelectric semiconductor.

Main Results:

An electrically reversible resistance change was observed in α-Cu₂Se.
Spontaneous electric dipoles formed by displaced Cu⁺ ions were identified.
α-Cu₂Se was confirmed as a multipolar antiferroelectric semiconductor.
Reversible switching of crystalline domains under applied voltage was linked to resistance change.

Conclusions:

The study reveals the mechanism behind electroresistance in α-Cu₂Se.
α-Cu₂Se exhibits properties suitable for novel electronic devices.
Semiconductors with localized polar symmetry present opportunities for future computational architectures.