Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators

• URL: http://arxiv.org/abs/2506.03263v1
• Date: Tue, 03 Jun 2025 18:00:14 GMT
• Title: Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators
• Authors: Lorenzo Lanzini, Purnendu Das, Michael Knap,
• Abstract summary: Altermagnetism has emerged as an unconventional form of collinear magnetism with spatial rotational symmetries.<n>We develop a theory for the Angle Resolved Photoemission Spectroscopy (ARPES) response of altermagnetic Mott insulators.<n>Our work paves the way for a systematic study of doping effects and correlation phenomena in altermagnetic Mott insulators.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Altermagnetism has emerged as an unconventional form of collinear magnetism with spatial rotational symmetries, that give rise to strongly spin-split bands despite of an underlying fully-compensated antiferromagnetic order. Here, we develop a theory for the Angle Resolved Photoemission Spectroscopy (ARPES) response of altermagnetic Mott insulators. Crucially, the spectrum does not simply reflect the non-interacting band structure, but instead a magnetic polaron is formed at low energies, that can be interpreted as a spinon-holon bound state. We develop a spinon-holon parton theory and predict a renormalized bandwidth that we confirm by tensor network simulations. We analyze the characteristic spin-split spectrum and identify a spin-dependent spectral weight of the magnetic polaron, resulting from the altermagnetic symmetry. Our work paves the way for a systematic study of doping effects and correlation phenomena in altermagnetic Mott insulators.

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