Dresden 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 19: Vacuum Science & Technology: Theory and Applications – Poster

O 19.8: Poster

Montag, 9. März 2026, 18:00–20:00, P2

Prospects of ARPES measurements in an external static magnetic field — Dmitry Usanov and •Daniil Yevtushynsky — Laboratory for Quantum Magnetism, EPFL, 1015 Lausanne, Switzeralnd

Angle-resolved photoemission spectroscopy (ARPES) has traditionally been performed in magnetically shielded environments, as external magnetic fields distort electron trajectories and worsen the momentum resolution. This limitation has prevented direct observation of many field-dependent electronic phenomena. Recent studies, however, have demonstrated that applying a strongly localized static magnetic field enables ARPES measurements under external field conditions. We propose to test a newly developed compact magnetic circuit, integrated into a standard flag-type sample holder, capable of generating a high magnetic flux density at the sample position while minimizing its effect on photoelectron trajectories. In the presentation we will discuss the optical action of the designed magnetic field and subsequent aberration corrections for different types of samples. In addition, we will provide estimations of the maximum magnetic field for ARPES in the soft X-ray and VUV ranges. At the end, we will propose different test systems, where moderate magnetic fields can tune the spin order and induce pronounced modifications of the band structure near the Fermi level. Successful implementation will establish a new experimental capability - ARPES in controlled static magnetic fields - opening pathways to study field-dependent band topology and spin-charge coupling across a broad class of quantum materials and heterostructures.

Keywords: ARPES; magnetic field