Altermagnetic surface states: towards the observation and utilization of altermagnetism in thin films, interfaces and topological materials

Sattigeri, Raghottam M.; Cuono, Giuseppe; Autieri, Carmine

doi:10.1039/d3nr03681b

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2024

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Cited by 5 publications

(1 citation statement)

References 48 publications

(73 reference statements)

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“…The points L 1 and L 2 have the same position of the Brillouin zone as it is in the case of MnTe. 51…”

Section: First Principles Calculationsmentioning

confidence: 99%

Wurtzite vs. rock-salt MnSe epitaxy: electronic and altermagnetic properties

Grzybowski,

Autieri,

Domagala

et al. 2024

Nanoscale

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“…The points L 1 and L 2 have the same position of the Brillouin zone as it is in the case of MnTe. 51…”

Section: First Principles Calculationsmentioning

confidence: 99%

Wurtzite vs. rock-salt MnSe epitaxy: electronic and altermagnetic properties

Grzybowski,

Autieri,

Domagala

et al. 2024

Nanoscale

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Stoichiometry‐Induced Ferromagnetism in Altermagnetic Candidate MnTe

Chilcote,

Mazza,

et al. 2024

Adv Funct Materials

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The field of spintronics has seen a surge of interest in altermagnetism due to novel predictions and many possible applications. MnTe is a leading altermagnetic candidate that is of significant interest across spintronics due to its layered antiferromagnetic structure, high Neel temperature (TN ≈ 310 K) and semiconducting properties. The results on molecular beam epitaxy (MBE) grown MnTe/InP(111) films are presented. Here, it is found that the electronic and magnetic properties are driven by the natural stoichiometry of MnTe. Electronic transport and in situ angle‐resolved photoemission spectroscopy show the films are natively metallic with the Fermi level in the valence band and the band structure is in good agreement with first‐principles calculations for altermagnetic spin‐splitting. Neutron diffraction confirms that the film is antiferromagnetic with planar anisotropy and polarized neutron reflectometry indicates weak ferromagnetism, which is linked to a slight Mn‐richness that is intrinsic to the MBE‐grown samples. When combined with the anomalous Hall effect, this work shows that the electronic response is strongly affected by the ferromagnetic moment. Altogether, this highlights potential mechanisms for controlling altermagnetic ordering for diverse spintronic applications.

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Orientation-dependent spin-polarization and transport properties in altermagnet based resonant tunneling junctions

Lyu,

2024

Results in Physics

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Altermagnetic surface states: towards the observation and utilization of altermagnetism in thin films, interfaces and topological materials

Abstract: We unveil properties of altermagnetic surface states by identifying surfaces where altermagnetism is active or inactive in three compounds LaMnO3, MnTe and RuO2 representative of orthorhombic, hexagonal, and tetragonal symmetries respectively.

Cited by 5 publications

References 48 publications

Wurtzite vs. rock-salt MnSe epitaxy: electronic and altermagnetic properties

Wurtzite vs. rock-salt MnSe epitaxy: electronic and altermagnetic properties

Stoichiometry‐Induced Ferromagnetism in Altermagnetic Candidate MnTe

Orientation-dependent spin-polarization and transport properties in altermagnet based resonant tunneling junctions

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