@article{30418e76afbd419cb551e6e12774382f,
title = "Observation of gapless Dirac surface states in ZrGeTe",
abstract = "The experimental discovery of the topological Dirac semimetal establishes a platform to search for various exotic quantum phases in real materials. ZrSiS-Type materials have recently emerged as topological nodal-line semimetals where gapped Dirac-like surface states are observed. Here, we present a systematic angle-resolved photoemission spectroscopy (ARPES) study of ZrGeTe, a nonsymmorphic symmetry protected Dirac semimetal. We observe two Dirac-like gapless surface states at the same X point of the Brillouin zone. Our theoretical analysis and first-principles calculations reveal that these are protected by crystalline symmetry. Hence, ZrGeTe appears as a rare example of a naturally fine tuned system where the interplay between symmorphic and nonsymmorphic symmetry leads to rich phenomenology and thus opens up opportunities to investigate the physics of Dirac semimetallic and topological insulating phases realized in a single material.",
author = "Hosen, {M. Mofazzel} and Klauss Dimitri and Alex Aperis and Pablo Maldonado and Ilya Belopolski and Gyanendra Dhakal and Firoza Kabir and Christopher Sims and Hasan, {M. Zahid} and Dariusz Kaczorowski and Tomasz Durakiewicz and Oppeneer, {Peter M.} and Madhab Neupane",
note = "Funding Information: M.N. is supported by the Air Force Office of Scientific Research under Award Number FA9550-17-1-0415 and the startup fund from UCF. T.D. is supported by NSF IR/D program. A.A., P.M., and P.M.O. acknowledge support from the Swedish Research Council (VR), the R{\"o}ntgen-{\AA}ngstr{\"o}m Cluster, and the Swedish National Infrastructure for Computing (SNIC). I.B. acknowledges the support of the NSF GRFP. Work at Princeton University is supported by the Emergent Phenomena in Quantum Systems Initiative of the Gordon and Betty Moore Foundation under Grant No. GBMF4547 (M.Z.H.) and by the National Science Foundation, Division of Materials Research, under Grant No. NSF-DMR-1507585 and No. NSF-DMR-1006492. We thank Sung-Kwan Mo and Jonathan Denlinger for beamline assistance at the LBNL. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = mar,
day = "7",
doi = "10.1103/PhysRevB.97.121103",
language = "English (US)",
volume = "97",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "12",
}