Deciphering the ultra-high plasticity in metal monochalcogenides

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Lok Wing Wong
  • Ke Yang
  • Wei Han
  • Xiaodong Zheng
  • Hok Yin Wong
  • Chi Shing Tsang
  • Shu Ping Lau
  • Ming Yang
  • Jiong Zhao

Detail(s)

Original languageEnglish
Pages (from-to)196–204
Number of pages22
Journal / PublicationNature Materials
Volume23
Online published8 Jan 2024
Publication statusPublished - Feb 2024

Abstract

The quest for electronic devices that offer flexibility, wearability, durability and high performance has spotlighted two-dimensional (2D) van der Waals materials as potential next-generation semiconductors. Especially noteworthy is indium selenide, which has demonstrated surprising ultra-high plasticity. To deepen our understanding of this unusual plasticity in 2D van der Waals materials and to explore inorganic plastic semiconductors, we have conducted in-depth experimental and theoretical investigations on metal monochalcogenides (MX) and transition metal dichalcogenides (MX2). We have discovered a general plastic deformation mode in MX, which is facilitated by the synergetic effect of phase transitions, interlayer gliding and micro-cracks. This is in contrast to crystals with strong atomic bonding, such as metals and ceramics, where plasticity is primarily driven by dislocations, twinning or grain boundaries. The enhancement of gliding barriers prevents macroscopic fractures through a pinning effect after changes in stacking order. The discovery of ultra-high plasticity and the phase transition mechanism in 2D MX materials holds significant potential for the design and development of high-performance inorganic plastic semiconductors. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

Citation Format(s)

Deciphering the ultra-high plasticity in metal monochalcogenides. / Wong, Lok Wing; Yang, Ke; Han, Wei et al.
In: Nature Materials, Vol. 23, 02.2024, p. 196–204.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review