Epitaxial stabilization of magnetic GdAuSb/LaAuSb superlattices
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866910043890253824 |
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| author | Strohbeen, Patrick J. Im, Soohyun Samanta, Tamalika LaDuca, Zachary Du, Dongxue Shourov, Estiaque H. McChesney, Jessica L. Rodolakis, Fanny Voyles, Paul M. Kawasaki, Jason K. |
| author_facet | Strohbeen, Patrick J. Im, Soohyun Samanta, Tamalika LaDuca, Zachary Du, Dongxue Shourov, Estiaque H. McChesney, Jessica L. Rodolakis, Fanny Voyles, Paul M. Kawasaki, Jason K. |
| contents | We report the epitaxial stabilization of GdAuSb films and GdAuSb/LaAuSb superlattices via molecular beam epitaxy on (0001)-oriented Al$_{2}$O$_{3}$ substrates. GdAuSb crystallize in the Au-Au dimerized YPtAs structure type (space group $P6_{3}/mmc$), the same structure as the Dirac semimetal LaAuSb. Angle-resolved photoemission spectroscopy (ARPES) measurements show similar near $E_F$ bandstructures for GdAuSb and LaAuSb, plus a rigid band shift for GdAuSb towards more hole-like behavior and core-like Gd $4f$ states $\sim 9$~eV below the Fermi energy. LaAuSb/GdAuSb superlattices exhibit sharp superlattice fringes by X-ray diffraction and atomically-precise interfaces by scanning transmission electron microscopy. Superlattices display two transitions in temperature-dependent resistvity, compared to a single Néel temperature for thick GdAuSb films. Superlattices of $Ln$AuSb materials ($Ln=$ rare earth) with atomically abrupt interfaces offer a new epitaxial platform for control of magnetic and topological order via tunable intralayer exchange and reduced dimensionality. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_06500 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Epitaxial stabilization of magnetic GdAuSb/LaAuSb superlattices Strohbeen, Patrick J. Im, Soohyun Samanta, Tamalika LaDuca, Zachary Du, Dongxue Shourov, Estiaque H. McChesney, Jessica L. Rodolakis, Fanny Voyles, Paul M. Kawasaki, Jason K. Materials Science We report the epitaxial stabilization of GdAuSb films and GdAuSb/LaAuSb superlattices via molecular beam epitaxy on (0001)-oriented Al$_{2}$O$_{3}$ substrates. GdAuSb crystallize in the Au-Au dimerized YPtAs structure type (space group $P6_{3}/mmc$), the same structure as the Dirac semimetal LaAuSb. Angle-resolved photoemission spectroscopy (ARPES) measurements show similar near $E_F$ bandstructures for GdAuSb and LaAuSb, plus a rigid band shift for GdAuSb towards more hole-like behavior and core-like Gd $4f$ states $\sim 9$~eV below the Fermi energy. LaAuSb/GdAuSb superlattices exhibit sharp superlattice fringes by X-ray diffraction and atomically-precise interfaces by scanning transmission electron microscopy. Superlattices display two transitions in temperature-dependent resistvity, compared to a single Néel temperature for thick GdAuSb films. Superlattices of $Ln$AuSb materials ($Ln=$ rare earth) with atomically abrupt interfaces offer a new epitaxial platform for control of magnetic and topological order via tunable intralayer exchange and reduced dimensionality. |
| title | Epitaxial stabilization of magnetic GdAuSb/LaAuSb superlattices |
| topic | Materials Science |
| url | https://arxiv.org/abs/2603.06500 |