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ABSTRACT
The charge transport behavior of strontium fluoride nanocrystals has been investigated by in situ impedance measurement up to 41 GPa. It was found that the parameters changed discontinuously at each phase transition. The charge carriers in SrF2 nanocrystals include both F− ions and electrons. Pressure makes the electronic transport more difficult. The defects at grains dominate the electronic transport process. Pressure could make the charge–discharge processes in the Fm3m and Pnma phases more difficult.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
This work was supported by the National Natural Science Foundation of China under [grant numbers 11374131, 11674404, 11404137 and 61378085]; Program for New Century Excellent Talents in University under [grant number NCET-13–0824]; the Program for the Development of Science and Technology of Jilin Province under Grant [grant numbers 201201079, 20150204085GX]; the Twentieth Five-Year Program for Science and Technology of Education Department of Jilin Province under [grant number 20150221].