期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.117206
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资金
- Swedish e-Science Research Centre (SeRC)
- Swedish Research Council [621-2011-4426]
- Swedish Foundation for Strategic Research (SSF) programs SRL Grant [10-0026]
- German Science Foundation (DFG)
- German Ministry for Education and Research (BMBF)
- National Science Foundation-Earth Sciences [EAR-1128799]
- Department of Energy-Geosciences [DE-FG02-94ER14466]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
We discover that hcp phases of Fe and Fe0.9Ni0.1 undergo an electronic topological transition at pressures of about 40 GPa. This topological change of the Fermi surface manifests itself through anomalous behavior of the Debye sound velocity, c/a lattice parameter ratio, and Mossbauer center shift observed in our experiments. First-principles simulations within the dynamic mean field approach demonstrate that the transition is induced by many-electron effects. It is absent in one-electron calculations and represents a clear signature of correlation effects in hcp Fe. DOI: 10.1103/PhysRevLett.110.117206
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