Publication Date:
2015-01-17
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, Su-Yang -- Liu, Chang -- Kushwaha, Satya K -- Sankar, Raman -- Krizan, Jason W -- Belopolski, Ilya -- Neupane, Madhab -- Bian, Guang -- Alidoust, Nasser -- Chang, Tay-Rong -- Jeng, Horng-Tay -- Huang, Cheng-Yi -- Tsai, Wei-Feng -- Lin, Hsin -- Shibayev, Pavel P -- Chou, Fang-Cheng -- Cava, Robert J -- Hasan, M Zahid -- New York, N.Y. -- Science. 2015 Jan 16;347(6219):294-8. doi: 10.1126/science.1256742. Epub 2014 Dec 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544, USA. Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA. ; Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544, USA. ; Department of Chemistry, Princeton University, Princeton, NJ 08544, USA. ; Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan. ; Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan. ; Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan. Institute of Physics, Academia Sinica, Taipei 11529, Taiwan. ; Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan. ; Graphene Research Centre and Department of Physics, National University of Singapore 117542. ; Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan. National Synchrotron Radiation Research Center, Taiwan. ; Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544, USA. Princeton Center for Complex Materials, Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA. mzhasan@princeton.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25593189" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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