Observation of Dirac-Like Semi-Metallic Phase in NdSb

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 angle-resolved 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 ($\Gamma$) 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 $\Gamma$ 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.

arXiv comment6 pages, 3 figures, To appear in Journal of Physics: Condensed Matter

References in corpus (17)

• Topological Insulators
• Topological insulators and superconductors
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Titanic Magnetoresistance in WTe2
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Consequences of breaking time reversal symmetry in LaSb: a resistivity plateau and extreme magnetoresistance
• Topological semimetals and topological insulators in rare earth monopnictides
• Gigantic surface life-time of an intrinsic topological insulator revealed via time-resolved (pump-probe) ARPES
• Electron-Hole Asymmetry in Superconductivity of Pnictides Originated from the Observed Rigid Chemical Potential Shift
• Non-Kondo-like Electronic Structure in the Correlated Rare-Earth Hexaboride YbB${}_6$

Cited by in corpus (27)

• Multiple Dirac cones at the surface of the topological metal LaBi
• Tunability of the topological nodal-line semimetal phase in ZrSiX-type materials
• Observation of topological nodal-line fermionic phase in GdSbTe
• Evidence of topological insulator state in the semimetal LaBi
• Magnetoresistance in YBi and LuBi semimetals due to nearly perfect carrier compensation
• Giant magnetoresistance, three-dimensional Fermi surface and origin of resistivity plateau in YSb semimetal
• Origin of the Extremely Large Magnetoresistance in the Semimetal YSb
• Tunable Electronic Structure and Surface States in Rare Earth Mono-Bismuthides with Partially Filled f Shell
• Observation of Gapless Dirac Surface States in ZrGeTe
• Extremely large magnetoresistance and Fermi surface topology of PrSb
• Observation of topological nodal-loop state in RAs3 (R = Ca, Sr)
• Extreme magnetoresistance and Shubnikov-de Haas oscillations in ferromagnetic DySb
• Unusual magnetotransport in holmium monoantimonide
• Extremely Large Magnetoresistance and Electronic Structure of TmSb
• Anomalous quantum oscillations and evidence for a non-trivial Berry phase in SmSb
• Observation of gapped state in rare-earth monopnictide HoSb
• Complex electronic structure evolution of NdSb across the magnetic transition
• Dirac State in a Centrosymmetric Superconductor alpha-PdBi2
• Probing the Origin of Extreme Magnetoresistance in Pr/Sm Mono-Antimonides/Bismuthides
• Behavior of gapped and ungapped Dirac cones in an antiferromagnetic topological metal, SmBi
• Extremely large magnetoresistance and compensated Fermi surfaces in the antiferromagnetic semimetal YbAs
• Antiferromagnetism and spin density waves in 3D Dirac semimetals
• Signatures of non-trivial band topology in LaAs/LaBi heterostructure
• Electronic Structure of a Nodal Line Semimetal Candidate TbSbTe
• Tunable plasmon modes and topological transitions in single- and bilayer semi-Dirac materials
• Materials and possible mechanisms of extremely large magnetoresistance: A review
• Spin-orbital order and excitons in magnetoresistive HoBi