Effect of symmetry distortions on photoelectron selection rules and spectra of Bi_2Sr_2CaCu_2O_{8+ delta}

TL;DR

This paper derives photoelectron selection rules for Bi2212, explaining spectral intensity variations and supporting the structural origin of shadow bands, with implications for detecting antiferromagnetic signatures.

Contribution

It introduces a theoretical framework for understanding photoelectron selection rules in Bi2212, linking symmetry distortions to spectral features and proposing methods to detect magnetic signatures.

Findings

Selection rules explain reversed intensity behavior of shadow and main bands.

Simulations support structural origin of shadow band.

Proposes scenario for detecting antiferromagnetic signatures.

Abstract

We derive photoelectron selection rules along the glide plane in orthorhombic Bi_2Sr_2CaCu_2O_{8+\delta} (Bi2212). These selection rules explain the reversed intensity behavior of the shadow and the main band of the material as a natural consequence of the variating representation of the final state as a function of k_\parallel. Our one-step simulations strongly support the structural origin of the shadow band but we also introduce a scenario for detecting antiferromagnetic signatures in low doping.