Unconventional Defects in a Quasi-One-Dimensional KMn6Bi5

Hee Joon Jung, Jin Ke Bao, Duck Young Chung, Mercouri G. Kanatzidis, Vinayak P. Dravid

Research output: Contribution to journalArticle

Abstract

Quasi-one-dimensional (Q1D) structures comprising a compact array of indefinitely long 1D nanowires (NWs) are scarce, especially in a bulk device-scale showing metallic and semiconducting behaviors along different axes. Unlike plentiful observations of nature of defects in three-/two-dimensional materials, there is a notable paucity of such reports in Q1D. Herein we present unconventional motific defects and their properties in a bulk Q1D KMn6Bi5 crystal, in which an individual NW motif acts as one body. We discovered motific inter- and intra-NW defects, such that a linear set of 1D motifs are displaced. Stress generates two domains with altered inter-NW spacings and a Bi-Mn solid solution grain, leading to a local bulk plasmon shift due to NW array reconfiguration as well as atomic rearrangement. The observation of such exotic defects and associated phenomena in this Q1D may provide guidance on overall defect mechanism in other Q1D systems and their collective anisotropic properties.

Original languageEnglish
Pages (from-to)7476-7486
Number of pages11
JournalNano letters
Volume19
Issue number10
DOIs
Publication statusPublished - Oct 9 2019

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Keywords

  • KMnBi
  • Quasi-one-dimensional
  • local bulk plasmon shift by motific reconfiguration
  • motific inter- and intra-nanowire defects
  • stress-induced motific deformation

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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