Using persistent photoconductivity to write a low-resistance path in SrTiO3
| Autor: | Matthew D. McCluskey, Violet M. Poole, S. J. Jokela |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Orders of magnitude (temperature) Science Infrared spectroscopy 02 engineering and technology Conductivity 01 natural sciences law.invention chemistry.chemical_compound law 0103 physical sciences Electrical measurements 010306 general physics Multidisciplinary business.industry Contact resistance 021001 nanoscience & nanotechnology Laser Semiconductor chemistry Strontium titanate Optoelectronics Medicine 0210 nano-technology business |
| Zdroj: | Scientific Reports, Vol 7, Iss 1, Pp 1-6 (2017) |
| ISSN: | 2045-2322 |
| Popis: | Materials with persistent photoconductivity (PPC) experience an increase in conductivity upon exposure to light that persists after the light is turned off. Although researchers have shown that this phenomenon could be exploited for novel memory storage devices, low temperatures (below 180 K) were required. In the present work, two-point resistance measurements were performed on annealed strontium titanate (SrTiO3, or STO) single crystals at room temperature. After illumination with sub-gap light, the resistance decreased by three orders of magnitude. This markedly enhanced conductivity persisted for several days in the dark. Results from IR spectroscopy, electrical measurements, and exposure to a 405 nm laser suggest that contact resistance plays an important role. The laser was then used as an “optical pen” to write a low-resistance path between two contacts, demonstrating the feasibility of optically defined, transparent electronics. |
| Databáze: | OpenAIRE |
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