Non thermal isostructural electrically driven insulator-metal transition and electro-strain in layered cobaltate

Abdul Ahad; R. Rawat; F. Rahman; D. K. Shukla

Non thermal isostructural electrically driven insulator-metal transition and electro-strain in layered cobaltate

Strongly Correlated Electrons 2019-08-06 v1 Materials Science

Authors: Abdul Ahad , R. Rawat , F. Rahman , D. K. Shukla

Abstract

We report here a discovery of electrically driven insulator to metal transition (IMT) and concomitant isostructural volume expansion in the layered cobaltates which otherwise do not exhibit temperature dependent IMT. These findings are demonstrated at macroscopic, microscopic and atomic scales. With application of voltage growth of metallic regions have been observed in the 2D layered La2-xSrxCoO4. Growth of metallic regions is associated with volume increase (strain as high as 0.3%). Non thermal IMT and electro-strain are proposed to be caused by electro-proliferation of the Co3+ high spin states.

Keywords

insulator-metal transition electro-strain layered cobaltate la2-xsrxcoo4 high spin state non thermal

Cite

@article{arxiv.1908.01125,
  title  = {Non thermal isostructural electrically driven insulator-metal transition and electro-strain in layered cobaltate},
  author = {Abdul Ahad and R. Rawat and F. Rahman and D. K. Shukla},
  journal= {arXiv preprint arXiv:1908.01125},
  year   = {2019}
}

Comments

13 pages, 7 figures

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