Spin-resolved quasiparticle interference patterns on altermagnets via non-spin-resolved scanning tunneling microscopy

Abstract

We investigate quasiparticle interference on an altermagnetic Lieb-like lattice and show how a non-spin-polarized scanning tunneling microscopy measurement can yield effectively spin-resolved information. Within a four-site tight-binding model, which can be tuned between an antiferromagnetic and a Lieb-type altermagnetic state, we introduce on-site impurities at distinct sublattice sites and compute the real space local density of states (LDOS) via a Green's function approach. A Fourier transformation of the impurity-induced LDOS yields the characteristic $d$-wave spin-split Fermi surface contours of the altermagnetic phase. Notably, by choosing which sublattice the impurity is placed upon, we show that the scattering amplitudes effectively encode spin-dependent contrasts: Impurities on one of the magnetic sublattices highlights predominantly spin-up contributions along one crystallographic direction, while impurities on the other one favor the complementary spin-down channel and orientation.

9 pages, 4 figures

References in corpus (32)

• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Crystal Hall effect in Collinear Antiferromagnets
• Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Broken Kramers' degeneracy in altermagnetic MnTe
• Experimental realization and characterization of an electronic Lieb lattice
• Direct observation of altermagnetic band splitting in CrSb thin films
• Prediction of unconventional magnetism in doped FeSb2
• Large band-splitting in $g$-wave type altermagnet CrSb
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• Three-dimensional mapping of the altermagnetic spin splitting in CrSb
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
• Magnetic octupoles as the order parameter for unconventional antiferromagnetism
• Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
• Crystal-symmetry-paired spin-valley locking in a layered room-temperature antiferromagnet
• Fragility of the magnetic order in the prototypical altermagnet RuO${}_2$
• Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
• Quasiparticle Interference Studies of Quantum Materials
• Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
• Impurity-induced Friedel oscillations in altermagnets and $p$-wave magnets
• Elasto-Hall conductivity and the anomalous Hall effect in altermagnets
• Altermagnetic phase transition in a Lieb metal
• Altermagnetic variants in thin films of Mn5Si3
• Interface-induced magnetization in altermagnets and antiferromagnets
• Determination of the Néel vector in rutile altermagnets through x-ray magnetic circular dichroism: the case of MnF${}_2$
• Local signatures of altermagnetism
• Controlling photo-excited electron-spin by light-polarization in ultrafast-pumped altermagnets
• Phonon-mediated spin-polarized superconductivity in altermagnets
• Quasiparticle interference in altermagnets
• Quantum geometry and magnon Hall transport in an altermagnet
• Quantum critical scaling of altermagnetism

Cited by in corpus (2)

• Spin-dependent quasiparticle lifetimes in altermagnets
• Altermagnetic Metal-Organic Frameworks