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Observation of topological nodal fermion semimetal phase in ZrSiS
Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA..
Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA..
Princeton Univ, Joseph Henry Lab, Princeton, NJ 08544 USA.;Princeton Univ, Dept Phys, Princeton, NJ 08544 USA..
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2016 (English)In: PHYSICAL REVIEW B, ISSN 2469-9950, Vol. 93, no 20, 201104Article in journal (Refereed) PublishedText
Abstract [en]

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 the search for other exotic phases of matter. Here we present a systematic angle-resolved photoemission spectroscopy 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, elliptical-shaped Fermi surface, and a small electron pocket encircling at the zone center (Gamma) 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 on which to explore exotic states of quantum matter; these materials are expected to provide an avenue for engineering two-dimensional topological insulator systems.

Place, publisher, year, edition, pages
2016. Vol. 93, no 20, 201104
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-298096DOI: 10.1103/PhysRevB.93.201104ISI: 000375997100001OAI: oai:DiVA.org:uu-298096DiVA: diva2:944418
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish National Infrastructure for Computing (SNIC)
Available from: 2016-06-29 Created: 2016-06-29 Last updated: 2016-06-29Bibliographically approved

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Maldonado, PabloOppeneer, Peter M.
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