# Detecting non-unitary multiorbital superconductivity with Dirac points at finite energies

## TL;DR

This paper proposes using the behavior of Dirac points at finite energies as a novel method to identify non-unitary multiorbital superconductivity, providing a new spectroscopic approach for understanding complex superconducting states.

## Contribution

It introduces a new spectroscopic signature involving Dirac point gap openings to detect non-unitary multiorbital superconducting order.

## Key findings

- Dirac point gap openings indicate non-unitary multiorbital superconductivity
- Spectral features at higher energies reveal broken symmetries
- Angle-resolved photo-emission spectroscopy can detect these signatures

## Abstract

Determining the symmetry of the order parameter of unconventional superconductors remains a recurrent topic and non-trivial task in the field of strongly correlated electron systems. Here we show that the behavior of Dirac points away from the Fermi energy is a potential tool to unveil the orbital structure of a superconducting state. In particular, we show that gap openings in such Dirac crossings are a signature of non-unitary multiorbital superconducting order. Consequently, also spectral features at higher energy can help us to identify broken symmetries of superconducting phases and the orbital structure of non-unitary states. Our results show how angle-resolved photo-emission spectroscopy measurements can be used to detect non-unitary multiorbital superconductivity.