$k_z$ selective scattering within Quasiparticle Interference measurements of FeSe

Abstract

Quasiparticle interference (QPI) provides a wealth of information relating to the electronic structure of a material. However, it is often assumed that this information is constrained to two-dimensional electronic states. Here, we show that this is not necessarily the case. For FeSe, a system dominated by surface defects, we show that it is actually all electronic states with negligible group velocity in the $z$ axis that are contained within the experimental data. By using a three-dimensional tight binding model of FeSe, fit to photoemission measurements, we directly reproduce the experimental QPI scattering dispersion, within a T-matrix formalism, by including both $k_z=0$ and $k_z=\pi$ electronic states. This result unifies both tunnelling and photoemission based experiments on FeSe and highlights the importance of $k_z$ within surface sensitive measurements of QPI.

References in corpus (3)

• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• The key ingredients of the electronic structure of FeSe
• Impurity-induced resonant states in topological nodal-line semimetals

Cited by in corpus (13)

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• On the Remarkable Superconductivity of FeSe and its Close Cousins
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• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• FeSe and the missing electron pocket problem
• Superconducting FeSe monolayer with milli-electron volt Fermi energy
• Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
• On the nature of quasiparticle interference in three dimensions
• Atomic-scale imaging of emergent order at a magnetic-field-induced Lifshitz transition
• calcQPI: A versatile tool to simulate quasiparticle interference
• Intermediate band analysis in Green's functions calculations of quasiparticle interference
• Tomographic mapping of the hidden dimension in quasi-particle interference