Observation of Fermi arc surface states in a topological metal
Top Cited Papers
- 16 January 2015
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 347 (6219), 294-298
- https://doi.org/10.1126/science.1256742
Abstract
The topology of the electronic structure of a crystal is manifested in its surface states. Recently, a distinct topological state has been proposed in metals or semimetals whose spin-orbit band structure features three-dimensional Dirac quasiparticles. We used angle-resolved photoemission spectroscopy to experimentally observe a pair of spin-polarized Fermi arc surface states on the surface of the Dirac semimetal Na3Bi at its native chemical potential. Our systematic results collectively identify a topological phase in a gapless material. The observed Fermi arc surface states open research frontiers in fundamental physics and possibly in spintronics.Keywords
Funding Information
- U.S. Department of Energy (DE-FG-02-05ER46200)
- Army Research Office (W911NF-12-1-0461)
- Ministry of Science and Technology (103-2112-M-110-008-MY3)
- Singapore National Research Foundation (NRF-NRFF2013-03)
- National Science Council, Taiwan
- National Center for High-Performance Computing, Taiwan
- Computer and Information Network Center-National Taiwan University, Taiwan
- National Center for Theoretical Sciences, Taiwan
- MOST-Taiwan (103-2119-M-002-020-MY3)
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