期刊
PHYSICAL REVIEW B
卷 93, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.081105
关键词
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资金
- MOST [2011CBA001000, 2011CBA00102, 2012CB821403, 2013CB921703, 2015CB921301]
- NSFC from China [11004232, 11034011/A0402, 11274362]
- Materials Sciences and Engineering Division, Office of Basic Energy Sciences, U.S. DOE [DE-SC00112704]
- Sino-Swiss Science and Technology Cooperation [IZLCZ2138954]
- Swiss National Science Foundation [200021-137783]
- Swiss National Science Foundation (SNF) [200021_137783] Funding Source: Swiss National Science Foundation (SNF)
We present a combined angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations study of the electronic structure of LaAgSb2 in the entire first Brillouin zone. We observe a Dirac-cone-like structure in the vicinity of the Fermi level formed by the crossing of two linear energy bands, as well as the nested segments of a Fermi surface pocket emerging from the cone. Our ARPES results show the close relationship of the Dirac cone to the charge-density-wave ordering, providing consistent explanations for exotic behaviors in this material.
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