Observation of Dirac-like band dispersion in LaAgSb2
Authorized Users Only
Matt, C. E.
Dhaka, R. S.
Yang, Y. -F.
MetadataShow full item record
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.
Source:Physical Review B: Condensed Matter and Materials Physics, 2016, 93, 8
- 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]