期刊
SCIENCE
卷 332, 期 6036, 页码 1404-1406出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1200324
关键词
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资金
- U.S. Department of Energy (DOE), Energy Frontier Research Center [DE-SC0001057]
- Carnegie Institute of Washington, Carnegie DOE Alliance Center, University of Nevada at Las Vegas
- DOE-National Nuclear Security Administration
- DOE-Basic Energy Sciences
- NSF [DMR-0907325]
- DOE [DE-AC02-76SF00515]
- National Natural Science Foundation of China [10979002, 50920105101, 51050110136]
- China Postdoctoral Science Foundation
- Zhejiang University
- Ministry of Education of China
- Zhejiang Provincial Department of Science and Technology
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0907325] Funding Source: National Science Foundation
Glass lacks the long-range periodic order that characterizes a crystal. In the Ce75Al25 metallic glass (MG), however, we discovered a long-range topological order corresponding to a single crystal of indefinite length. Structural examinations confirm that the MG is truly amorphous, isotropic, and unstrained, yet under 25 gigapascals hydrostatic pressures, every segment of a centimeter-length MG ribbon devitrifies independently into a face-centered cubic (fcc) crystal with the identical orientation. By using molecular dynamics simulations and synchrotron x-ray techniques, we elucidate that the mismatch between the large Ce and small Al atoms frustrates the crystallization and causes amorphization, but a long-range fcc topological order still exists. Pressure induces electronic transition in Ce, which eliminates the mismatch and manifests the topological order by the formation of a single crystal.
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