Correlation between the structural change and the electrical transport properties of indium nitride under high pressure

Junkai Zhang, Ji Qi, Yanzhang Ma, Tingjing Hu, Jiejuan Yan, Feng Ke, Xiaoyan Cui, Yang Gao, Meiling Sun, Chunxiao Gao

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We report on the intriguing structural and electrical transport properties of compressed InN. Pronounced anomalies of the resistivity, Hall coefficient, electron concentration, and mobility are observed at ∼11.5 GPa, accompanied by a wurtzite-rocksalt structural transition confirmed using high-pressure XRD measurements and first-principles calculations. The pressure-tuned electrical properties of wurtzite and rocksalt InN are also studied, respectively. Particularly, compression pressure significantly decreases the electron concentration of rocksalt InN by two orders of magnitude and increases the mobility by ten fold. The obvious variations in electrical parameters can be rationalized by our band structure simulations, which reveal a direct-indirect energy crossover at 10 GPa, followed by the rapidly increasing patterns of the energy gap with a pressure coefficient of 33 meV GPa-1. Moreover the electron effective mass and energy gap are found to well satisfy with the k·p model. Definite correlation between the structural change and the electrical transport properties should shed a new light on building InN-based applications in the future.

Original languageEnglish
Pages (from-to)26758-26764
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number39
DOIs
StatePublished - 2017

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