Quasiparticle interference in altermagnets

Abstract

A novel collinear magnetic phase, termed ``altermagnetism,'' has recently been uncovered, characterized by zero net magnetization and momentum-dependent collinear spin-splitting. To understand the intriguing physical effects of altermagnets and explore their potential applications, it is crucial to analyze both the geometric and spin configurations of altermagnetic Fermi surfaces. Here, we conduct a comprehensive study of the quasiparticle interference (QPI) effects induced by both nonmagnetic and magnetic impurities in metallic altermagnets, incorporating the influence of Zeeman splitting and spin-orbit coupling. By examining the QPI patterns for various spin polarizations of magnetic impurities and different spin-probe channels, we identify a series of distinctive signatures that can be used to characterize altermagnetic Fermi surfaces. These predicted signatures can be directly compared with experimental results obtained through spin-resolved scanning tunneling spectroscopy.

14 pages, 5 figures, this version published in PRB

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Cited by in corpus (7)

• Local signatures of altermagnetism
• Tunneling spin Hall effect induced by unconventional $p$-wave magnetism
• Marginal Metals and Kosterlitz-Thouless Type Phase Transition in Disordered Altermagnets
• Spin-resolved quasiparticle interference patterns on altermagnets via non-spin-resolved scanning tunneling microscopy
• Image of helical local moment magnetic order in the STM spectrum
• Cartesian Nodal Lines and Magnetic Kramers Weyl Nodes in Spin-Split Antiferromagnets
• Moiré-resonant surface state in ultrathin RuO${}_2$