Observation Of Dirac-Like Semi-Metallic Phase In Ndsb
Keywords
ARPES; Dirac; NdSb; rare earth monopnictide; semi-metal; topological
Abstract
The search of new topological phases of matter is one of the new directions in condensed matter physics. Recent experimental realizations of Dirac semimetal phases pave the way to look for other exotic phases of matter in real materials. Here we present a systematic angleresolved photoemission spectroscopy (ARPES) study of NdSb, a potential candidate for hosting a Dirac semi-metal phase. Our studies reveal two hole-like Fermi surface pockets present at the zone center (Γ) point as well as two elliptical electron-pockets present in the zone corner (X) point of the Brillouin zone (BZ). Interestingly, Dirac-like linearly dispersive states are observed about the zone corner (X) point in NdSb. Our first-principles calculations agree with the experimentally observed bands at the Γ point. Moreover, the Dirac-like state observed in NdSb may be a novel correlated state, not yet predicted in calculations. Our study opens a new direction to look for Dirac semi-metal states in other members of the rare earth monopnictide family.
Publication Date
5-9-2016
Publication Title
Journal of Physics Condensed Matter
Volume
28
Issue
23
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1088/0953-8984/28/23/23LT02
Copyright Status
Unknown
Socpus ID
84969641431 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84969641431
STARS Citation
Neupane, Madhab; Mofazzel Hosen, M.; Belopolski, Ilya; Wakeham, Nicholas; and Dimitri, Klauss, "Observation Of Dirac-Like Semi-Metallic Phase In Ndsb" (2016). Scopus Export 2015-2019. 2297.
https://stars.library.ucf.edu/scopus2015/2297