caa a22 4500 52878529X 20190713030951.0 cr unu---uuuuu 180924s2016 xx s 000 0 eng 10.3929/ethz-b-000114600 doi 10.1038/ncomms11006 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/114600 Observation of Weyl nodes and Fermi arcs in tantalum phosphide [Elektronische Daten] [Nan Xu, Hongming Weng, B.Q. Lv, Christian E. Matt, Jihwey Park, Federico Bisti, Vladimir N. Strocov, Dariusz Gawryluk, Ekaterina Pomjakushina, Kazimierz Conder, Nicholas C. Plumb, Milan Radović, Gabriel Autès, Oleg V. Yazyev, Z. Fang, X. Dai, T. Qian, Joël Mesot, H. Ding, M. Shi] Nat Commun Open access ethresearch A Weyl semimetal possesses spin-polarized band-crossings, called Weyl nodes, connected by topological surface arcs. The low-energy excitations near the crossing points behave the same as massless Weyl fermions, leading to exotic properties like chiral anomaly. To have the transport properties dominated by Weyl fermions, Weyl nodes need to locate nearly at the chemical potential and enclosed by pairs of individual Fermi surfaces with non-zero Fermi Chern numbers. Combining angle-resolved photoemission spectroscopy and first-principles calculation, here we show that TaP is a Weyl semimetal with only a single type of Weyl fermions, topologically distinguished from TaAs where two types of Weyl fermions contribute to the low-energy physical properties. The simple Weyl fermions in TaP are not only of fundamental interests but also of great potential for future applications. Fermi arcs on the Ta-terminated surface are observed, which appear in a different pattern from that on the As-termination in TaAs and NbAs. Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch Xu Nan joint author Weng Hongming joint author Lv B.Q. joint author Matt Christian E. joint author Park Jihwey joint author Bisti Federico joint author Strocov Vladimir N. joint author Gawryluk Dariusz joint author Pomjakushina Ekaterina joint author Conder Kazimierz joint author Plumb Nicholas C. joint author Radović Milan joint author Autès Gabriel joint author Yazyev Oleg V. joint author Fang Z. joint author Dai X. joint author Qian T. joint author Mesot Joël joint author Ding H. joint author Shi M. joint author Nature Communications London : Nature Publishing Group 7, p. 11006 2041-1723 http://hdl.handle.net/20.500.11850/114600 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/114600 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Xu Nan joint author ETHRESEARCH 700 1- Weng Hongming joint author ETHRESEARCH 700 1- Lv B.Q. joint author ETHRESEARCH 700 1- Matt Christian E. joint author ETHRESEARCH 700 1- Park Jihwey joint author ETHRESEARCH 700 1- Bisti Federico joint author ETHRESEARCH 700 1- Strocov Vladimir N. joint author ETHRESEARCH 700 1- Gawryluk Dariusz joint author ETHRESEARCH 700 1- Pomjakushina Ekaterina joint author ETHRESEARCH 700 1- Conder Kazimierz joint author ETHRESEARCH 700 1- Plumb Nicholas C. joint author ETHRESEARCH 700 1- Radović Milan joint author ETHRESEARCH 700 1- Autès Gabriel joint author ETHRESEARCH 700 1- Yazyev Oleg V. joint author ETHRESEARCH 700 1- Fang Z. joint author ETHRESEARCH 700 1- Dai X. joint author ETHRESEARCH 700 1- Qian T. joint author ETHRESEARCH 700 1- Mesot Joël joint author ETHRESEARCH 700 1- Ding H. joint author ETHRESEARCH 700 1- Shi M. joint author ETHRESEARCH 773 0- Nature Communications London : Nature Publishing Group 7, p. 11006 2041-1723 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access