Journal article
Generation and the role of dislocations in single-crystalline phase-change In2Se3 nanowires under electrical pulses
Nanotechnology, Vol.27(33), pp.335704-335704
07/08/2016
Handle:
https://hdl.handle.net/2376/101500
PMID: 27389929
Abstract
We report the observation of the generation of dislocations in single-crystal phase-change In2Se3 nanowires under electrical pulses and the impact of these dislocations on electrical properties. Particularly, we correlated the atomic-scale structural characteristics with local electrical resistance variations, by performing transmission electron microscopy and scanning Kelvin probe microscopy on the same nanowires. By coupling the experimental results with first-principles density functional theory calculations, we show that the immobile dislocations are generated via vacancy condensations. Importantly, these dislocations lead to several orders of magnitude increase in the electrical resistance, while maintaining the single crystallinity of the lattice. These results significantly advance the fundamental understanding of the structure-property relation in this phase-change material under transient electrical excitations. From a practical perspective, the significant increase in the electrical resistance, driven by the formation of dislocations, can be exploited as a new electronic state in the single-crystalline phase in this phase-change material.
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Details
- Title
- Generation and the role of dislocations in single-crystalline phase-change In2Se3 nanowires under electrical pulses
- Creators
- Elham Mafi - Washington State University Department of Physics and Astronomy, Pullman, WA 99164, USAXin Tao - Washington State University Department of Physics and Astronomy, Pullman, WA 99164, USAWenguang Zhu - University of Science and Technology of China Synergetic Innovation Center of Quantum Information and Quantum Physics, Hefei, Anhui 230026, People's Republic of ChinaYanfei Gao - Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAChongmin Wang - Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USAYi Gu - Washington State University Department of Physics and Astronomy, Pullman, WA 99164, USA
- Publication Details
- Nanotechnology, Vol.27(33), pp.335704-335704
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- IOP Publishing
- Number of pages
- 8
- Grant note
- 1206960 / Division of Materials Research (http://dx.doi.org/10.13039/100000078)
- Identifiers
- 99900546652701842
- Language
- English
- Resource Type
- Journal article