Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe4

DOI: 10.1103/PhysRevB.95.241108

Authors: E. Haubold (IFW Dresden) , K. Koepernik (IFW Dresden) , D. Efremov (IFW Dresden) , S. Khim (IFW Dresden; Max-Planck-Institut für Chemische Physik fester Stoffe) , A. Fedorov (IFW Dresden; II. Physikalisches Institut, Universität zu Köln) , Y. Kushnirenko (IFW Dresden) , J. Van Den Brink (IFW Dresden; TU Dresden) , S. Wurmehl (IFW Dresden; TU Dresden) , B. Buchner (IFW Dresden; TU Dresden) , T. K. Kim (Diamond Light Source) , M. Hoesch (Diamond Light Source) , K. Sumida (Hiroshima University) , K. Taguchi (Hiroshima University) , T. Yoshikawa (Hiroshima University) , A. Kimura (Hiroshima University) , T. Okuda (Hiroshima Synchrotron Radiation Center (HSRC)) , S. V. Borisenko (IFW Dresden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 95

State: Published (Approved)
Published: June 2017
Diamond Proposal Number(s): 13856

Abstract: We present experimental evidence for a type-II noncentrosymmetric Weyl state in TaIrTe4 where it has been recently predicted theoretically. We find direct correspondence between angle-resolved photoemission spectroscopy data and calculated electronic structure both in the bulk and the surface, and clearly observe the exotic surface states which support the quasi-one-dimensional Fermi arcs connecting only four Weyl points. Remarkably, these electronic states are spin polarized in the direction along the arcs, thus highlighting TaIrTe4 as an interesting type-II Weyl semimetal with a promising application potential.

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Other Facilities: Hiroshima Synchrotron Radiation Center (HSRC)