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Direction-control of anisotropic electronic behaviors via ferroelasticity in two-dimensional α-MPI (M = Zr, Hf)

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Abstract

Directional control of electronic behaviors is highly desirable for developing novel devices. One major obstacle is the lack of feasible means with a switchable manner. Here, we propose that the direction-control of anisotropic electronic behaviors can be achieved via ferroelastic switching. Through first-principles calculations, we reveal that single-layer α-MPI (M = Zr, Hf) not only exhibits ultrahigh carrier mobility with an anisotropic character, but also harbors excellent ferroelasticity. The ferroelasticity in single-layer α-MPI shows moderate switching barriers and distinct ferroelastic signals, beneficial for its application in memory devices. Meanwhile, the carrier mobility of single-layer α-MPI is extremely high in the y direction, while low in the x direction, suggesting that the carriers tend to feature directional migration. Such coexistence indicates that the directional control of carrier migration is achievable in single-layer α-MPI by 90° reversible ferroelastic switching. Our findings thus provide an outstanding avenue for designing novel controllable electronic devices.

Graphical abstract: Direction-control of anisotropic electronic behaviors via ferroelasticity in two-dimensional α-MPI (M = Zr, Hf)

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Publication details

The article was received on 24 Apr 2019, accepted on 14 Jun 2019 and first published on 15 Jun 2019


Article type: Communication
DOI: 10.1039/C9MH00633H
Mater. Horiz., 2019, Advance Article

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    Direction-control of anisotropic electronic behaviors via ferroelasticity in two-dimensional α-MPI (M = Zr, Hf)

    T. Zhang, Y. Ma, L. Yu, B. Huang and Y. Dai, Mater. Horiz., 2019, Advance Article , DOI: 10.1039/C9MH00633H

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