Distinct multiple fermionic states in a single topological metal
Journal
Nature Communications
Journal Volume
9
Journal Issue
3002
Pages
1-8
Date Issued
2018
Author(s)
Hosen, M. M.
Dimitri, K.
Nandy, A. K.
Aperis, A.
Sankar, R.
Dhakal, G.
Maldonado, P.
Kabir, F.
Sims, C.
Kaczorowski, D.
Durakiewicz, T.
Oppeneer, P. M.
Neupane, M.
Abstract
P and discover properties, which are unique in a single topological quantum material. We experimentally observe weak topological insulator surface states and our calculations suggest additional strong topological insulator surface states. Our first-principles calculations reveal a one-dimensional Dirac crossing-the surface Dirac-node arc-along a high-symmetry direction which is confirmed by our ARPES measurements. This novel state originates from the surface bands of a weak topological insulator and is therefore distinct from the well-known Fermi arcs in semimetals.
Publisher
Nature Publishing Group
Type
journal article