Investigation of magnetic phases in parent compounds of iron-chalcogenides via quasiparticle scattering interference

¹ Asia Pacific Center for Theoretical Physics (APCTP) - Pohang, Gyeongbuk, 790-784, Korea
² Department of Physics, POSTECH - Pohang, Gyeongbuk 790-784, Korea
³ Max Planck POSTECH Center for Complex Phase Materials, POSTECH - Pohang 790-784, Korea
⁴ Institut für Theoretische Physik III, Ruhr-Universität Bochum - 44801 Bochum, Germany
⁵ National University of Science and Technology “MISiS” - 119049 Moscow, Russian Federation

Received: 10 March 2016
Accepted: 6 April 2016

Abstract

We employ a five-orbital tight-binding model to develop the mean-field solution for various possible spin density wave states in the iron-chalcogenides. The quasiparticle interference (QPI) technique is applied to detect signatures of these states due to scatterings arising from non-magnetic impurities. Apart from the experimentally observed double-striped structure with ordering vector , the QPI method is investigated for the extended-stripe as well as the orthogonal double-stripe phase. We discuss QPI as a possible tool to detect and classify various magnetic structures with different electronic structure reconstruction within the framework of the compound.