期刊
SCIENTIFIC REPORTS
卷 8, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-018-33512-w
关键词
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资金
- US DOE, Office of Basic Energy Sciences [DE-AC02-05CH11231]
- NRF of Korea [2016K1A4A4A01922028, 2017K1A3A7A09016384, 2018R1A2B6004538]
- US Department of Energy, Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division through the Theory of Materials FWP at Lawrence Berkeley National Laboratory (LBNL) [DE-AC02-05CH11231, KC2301]
- Molecular Foundry through the US Department of Energy, Office of Basic Energy Sciences
- U.S. DOE-BES, Division of Materials Science and Engineering [DE-SC0012704]
- National Natural Science Foundation of China [51671192, 51531008]
- KIST Institutional Program [2E28190]
We investigate the electronic structure of BaMnBi2 and BaZnBi2 using angle-resolved photoemission spectroscopy and first-principles calculations. Although they share similar structural properties, we show that their electronic structure exhibit dramatic differences. A strong anisotropic Dirac dispersion is revealed in BaMnBi2 with a decreased asymmetry factor compared with other members of AMnBi(2) (A = alkali earth or rare earth elements) family. In addition to the Dirac cones, multiple bands crossing the Fermi energy give rise to a complex Fermi surface topology for BaZnBi2. We further show that the strength of hybridization between Bi-p and Mn-dZn-s states is the main driver of the differences in electronic structure for these two related compounds.
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