Structural and electrical properties of InN hollow nanotubes under high pressure

Junkai Zhang, Yanzhang Ma, Meiling Sun, Guangchao Yin, Jinghai Yang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

High-pressure in-situ synchrotron X-ray diffraction and electrical measurements were performed on InN hollow nanotubes to establish the correlation between structural changes and electrical transportation properties under compression. XRD spectra indicate a partially reversible wurtzite-rocksalt structural transition of InN induced by compression. Pressure-cycling resistivity and impedance spectra measurements reveal the corresponding electrical anomalies during the transition. Variable temperature resistivity indicates an unexpected metallic-like conduction of InN within 100–300 K in whole observed pressure range, which is attributed to the gradually enhanced phonon scattering at nano-grain boundaries and the almost unchanged electron concentration with temperature elevation. Pressure dependent temperature coefficient further evidences the wurtzite-rocksalt structural transition. Definite conductive phase diagram reported here will shed a new light on building InN-based application of the future.

Original languageEnglish
Pages (from-to)306-310
Number of pages5
JournalMaterials Letters
Volume213
DOIs
StatePublished - Feb 15 2018

Keywords

  • Electrical properties
  • Nanocrystalline materials
  • Phase transformation
  • Spectroscopy

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