期刊
NATURE MATERIALS
卷 18, 期 4, 页码 377-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41563-019-0311-x
关键词
-
类别
资金
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC-0012375]
- National Science Foundation [DMR-1210588]
- National Science Foundation Center for Nanoscale Science [DMR-1420620]
- NSF [DMR-1744213]
- US Department of Energy, Office of Science [DE-AC02-06CH11357]
- US DOE Office of Science [DE-AC05-00OR22725]
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF5307]
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 PbTiO3/SrTiO3 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据