Optical creation of a supercrystal with three-dimensional nanoscale periodicity
- Physical Description:
- 1 online resource
- Additional Creators:
- Dai, C., Damodaran, A. R., Das, S., Hong, Z., Laanait, N., Lei, S., McCarter, M. R., Stoica, V. A., Stone, G. A., Yadav, A., Yuan, Y., and Zhang, Z.
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- Free-to-read Unrestricted online access
- "Stimulation with ultrafast light pulses can realize and manipulate states of matter with emergent structural, electronic and magnetic phenomena. However, these non-equilibrium phases are often transient and the challenge is to stabilize them as persistent states. Here, we show that atomic-scale PbTiO 3 /SrTiO 3 superlattices, counterpoising strain and polarization states in alternate layers, are converted by sub-picosecond optical pulses to a supercrystal phase. This phase persists indefinitely under ambient conditions, has not been created via equilibrium routes, and can be erased by heating. X-ray scattering and microscopy show this unusual phase consists of a coherent three-dimensional structure with polar, strain and charge-ordering periodicities of up to 30 nm. By adjusting only dielectric properties, the phase-field model describes this emergent phase as a photo-induced charge-stabilized supercrystal formed from a two-phase equilibrium state. Our results demonstrate opportunities for light-activated pathways to thermally inaccessible and emergent metastable states."
- Penn State Faculty and Staff Researcher Metadata Database Collection.
- Academic Journal Article
- Part Of:
- Nature Materials
18:4, pp. 377-383
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