magnetoARPES: Angle Resolved Photoemission Spectroscopy in the presence of a magnetic field.*

Angle-resolved photoemission spectroscopy (ARPES) is a crucial technique for studying electronic excitations in materials, revealing their single-particle spectral function. However, ARPES in a magnetic field has been challenging due to the deflection of the photoelectrons. We introduce "magnetoARPES," a variant that enables ARPES in the presence of a magnetic field. The magnetoARPES is achieved by using a microscopic probe beam on a thinned sample with a specialized sample holder generating a confined magnetic field up to ~ 100 mT at the surface of the sample. We present experimental and simulated data on graphene to explore how the magnetic field induces aberrations. The ability to perform ARPES in the presence of a magnetic field expands the scope of experiments and opens up new research opportunities, and would help understanding phenomena related to magnetism, superconductivity, and other magnetic effects in materials.