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Observation of topological nodal fermion semimetal phase in ZrSiS

Author(s): Neupane, Madhab; Belopolski, Ilya; Hosen, M. Mofazzel; Sanchez, Daniel S.; Sankar, Raman; et al

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Abstract: Unveiling new topological phases of matter is one of the current objectives in condensed matter physics. Recent experimental discoveries of Dirac and Weyl semimetals prompt to search for other exotic phases of matter. Here we present a systematic angle-resolved photoemission spectroscopy (ARPES) study of ZrSiS, a prime topological nodal semimetal candidate. Our wider Brillouin zone (BZ) mapping shows multiple Fermi surface pockets such as the diamond-shaped Fermi surface, ellipsoidal-shaped Fermi surface, and a small electron pocket encircling at the zone center (Γ) point, the M point and the X point of the BZ, respectively. We experimentally establish the spinless nodal fermion semimetal phase in ZrSiS, which is supported by our first-principles calculations. Our findings evidence that the ZrSiS-type of material family is a new platform to explore exotic states of quantum matter, while these materials are expected to provide an avenue for engineering two-dimensional topological insulator systems.
Publication Date: May-2016
Electronic Publication Date: 11-May-2016
Citation: Neupane, Madhab, Belopolski, Ilya, Hosen, M Mofazzel, Sanchez, Daniel S, Sankar, Raman, Szlawska, Maria, Xu, Su-Yang, Dimitri, Klauss, Dhakal, Nagendra, Maldonado, Pablo, Oppeneer, Peter M, Kaczorowski, Dariusz, Chou, Fangcheng, Hasan, M Zahid, Durakiewicz, Tomasz. (2016). Observation of topological nodal fermion semimetal phase in ZrSiS. Physical Review B, 93 (20), 10.1103/PhysRevB.93.201104
DOI: doi:10.1103/PhysRevB.93.201104
ISSN: 2469-9950
EISSN: 2469-9969
Pages: 1 - 6
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Author's manuscript

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